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FiTech 30-21-411 Ultra Port EFI SBC System

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#5213021411

FiTech 30-21-411 Ultra Port EFI SBC System

45 Lbs.
19 × 18 × 29 in
1000 Maximum Horsepower with Gas

$2,249.10

/each

Factory Shipped

$2,499.00

Save $249.90

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Product Summary

Multi-port Injection Style, 1000 Max Horsepower Rating

45 Lbs.
19 × 18 × 29 in
1000 Maximum Horsepower with Gas
Aluminum

Rebates Available

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Key Specs

MFG. Part #	30-21-411
Brand	FiTech
Injection Style	Multi-port
Max Horsepower Rating	1000
ECM Included	No

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FiTech 30-21-411 Details

The Ultra Port EFI System in Ultra Black finish is a high-performance, multi-port fuel injection system for Chevy Small Block Vortec engines, supporting up to 1000 horsepower on gasoline. Designed for applications using forced induction or nitrous oxide, this complete kit includes a cast aluminum intake manifold, 80 lb/hr injectors, and a 4-barrel square bore throttle body with 86mm venturis delivering 1000 cfm. It features a full sensor suite (MAP, IAT, TPS, IAC, O2), a 3-Bar TMAP sensor, and a built-in ECM and transmission controller for seamless engine management. With speed density metering, the system is both self-tuning and fully user-tunable, compatible with gasoline, alcohol, methanol, and flex fuels. Though a fuel pump and regulator are not included, the system provides everything else needed for a powerful and modern EFI upgrade, including wiring harness and calibration module, all packaged in a sleek black throttle body finish.

45 Lbs.
19 × 18 × 29 in
1000 Maximum Horsepower with Gas
Aluminum

Rebates

FiTech 10% Off Select Parts Labor Day Sale 2026

FiTech Fuel Injection is pleased to announce our Labor Day Specials, running from September 1, 2026, through September 30, 2026. For a limited time, customers can save over $350 on Ultra Port EFI systems and EFI Master Kits, making it the perfect opportunity to upgrade to modern fuel injection with improved performance and drivability. 10% off applicable parts. Sale prices are applicable only to purchases made within the specified sale period, from September 1, 2026, to September 30, 2026. No rainchecks or exceptions will be provided. Sale price is valid through September 30. Regular MAP Pricing will be reinforced on October 1, 2026. This sale cannot be combined with any other offers, discounts, or promotions. Co-ops will be honored.

CARB Warning

For use on pre-1966 vehicles only

Emissions warning: this part only legal for sale or use in California if installed in vehicles model-year 1965 or older; motorcycles model-year 1977 or older; or off-highway recreational vehicles (such as off-road motorcycles and all-terrain vehicles) model-year 1996 and older. ++any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering there are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.

CA Prop 65

CARB warning

FiTech 30-21-411 Specifications

KEY SPECS
MFG. Part #	30-21-411
Brand	FiTech
Injection Style	Multi-port
Max Horsepower Rating	1000
ECM Included	No

GENERAL
Fuel Injection System Type	Single 4-Barrel Throttle Body (4150 Flange)
User Tunable	Yes
Self Tuning	Yes
Injectors Included	Yes
Metering Style	Speed density
EGR	No
Throttle Body Included	Yes
Throttle Body Material	Cast Aluminum
Throttle Body Finish	Powder Coated
Throttle Body Flange Type	4-Barrel Square Bore
Intake Material	Aluminum
Intake Finish	Black Powder Coated
Venturi Quantity	4
Calibration Module Included	Yes
Wiring Harness Included	Yes
Fuel Pressure Regulator Included	No
MAP Sensor Included	Yes
IAC Motor Included	Yes
IAT Sensor Included	Yes
TPS Sensor Included	Yes
Venturi Diameter	44.00mm
GTIN Code	854549007170
Sold in Quantity	Kit
Transmission Controller Included	No
Multi-Port Fuel Rails Included	Yes

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Fitment

1991-1993 Buick Roadmaster

Gen 1 L03 Small Block Chevy

1994 Buick Roadmaster

Gen 1 L05 Small Block Chevy

1995-1996 Buick Roadmaster

Gen 2 LT1 Small Block Chevy

1991-1992 Cadillac Brougham

1-Piece Rear Main 305 LB9

1999-2000 Cadillac Escalade

Vortec L31 Small Block Chevy

1990-1992 Cadillac Fleetwood

Gen 1 L05 Small Block Chevy

1993-1996 Cadillac Fleetwood

Gen 2 LT1 Small Block Chevy

1973-1975 Chevy Bel Air

Gen 1 L48 Small Block Chevy

1972 Chevy Blazer

Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy

1973-1974 Chevy Blazer

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy

1987 Chevy Blazer

Gen 1 L03 Small Block Chevy
Gen 1 L05 Small Block Chevy

1988-1994 Chevy Blazer

Gen 1 L05 Small Block Chevy

1973-1975 Chevy C10

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy

1976-1982 Chevy C10

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
Gen 1 LG3 Small Block Chevy

1983 Chevy C10

2-Piece Rear Main Chevy 350
Gen 1 LG3 Small Block Chevy

1984 Chevy C10

Gen 1 L48 Small Block Chevy
Gen 1 LG3 Small Block Chevy

1985 Chevy C10

2-Piece Rear Main Chevy 350
Gen 1 LG3 Small Block Chevy

1986 Chevy C10

1-Piece Rear Main 305 LG4
Gen 1 L05 Small Block Chevy
Gen 1 LG3 Small Block Chevy

1972-1975 Chevy C10 Suburban

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy

1976-1982 Chevy C10 Suburban

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
Gen 1 LG3 Small Block Chevy

1983 Chevy C10 Suburban

2-Piece Rear Main 305 LG4
2-Piece Rear Main Chevy 350

1984 Chevy C10 Suburban

2-Piece Rear Main 305 LG4
Gen 1 L48 Small Block Chevy

1985 Chevy C10 Suburban

2-Piece Rear Main 305 LG4
2-Piece Rear Main Chevy 350

1986 Chevy C10 Suburban

2-Piece Rear Main 305 LG4
Gen 1 L03 Small Block Chevy
Gen 1 L05 Small Block Chevy

1982-1987 Chevy C15

Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
Gen 1 LE9 Small Block Chevy

1988 Chevy C15

Gen 1 L03 Small Block Chevy
Gen 1 L05 Small Block Chevy

1988-1995 Chevy C1500

Gen 1 L03 Small Block Chevy
Gen 1 L05 Small Block Chevy

1996 Chevy C1500

Gen 1 L03 Small Block Chevy
Gen 1 L05 Small Block Chevy
Vortec L30 Small Block Chevy
Vortec L31 Small Block Chevy

1997-1999 Chevy C1500

Gen 1 L05 Small Block Chevy
Vortec L30 Small Block Chevy
Vortec L31 Small Block Chevy

1992-1995 Chevy C1500 Suburban

Gen 1 L05 Small Block Chevy

1996-1999 Chevy C1500 Suburban

Gen 1 L05 Small Block Chevy
Vortec L31 Small Block Chevy

1972-1976 Chevy C20

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy

1977-1982 Chevy C20

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
Gen 1 LG3 Small Block Chevy

1983 Chevy C20

2-Piece Rear Main 305 LG4

1984 Chevy C20

2-Piece Rear Main 305 LG4
Gen 1 L48 Small Block Chevy

1985 Chevy C20

2-Piece Rear Main 305 LG4

1986 Chevy C20

2-Piece Rear Main 305 LG4
Gen 1 L03 Small Block Chevy
Gen 1 L05 Small Block Chevy

1987 Chevy C20

Gen 1 L03 Small Block Chevy
Gen 1 L05 Small Block Chevy

1972-1975 Chevy C20 Suburban

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy

1976-1978 Chevy C20 Suburban

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
Gen 1 LG3 Small Block Chevy

1979-1982 Chevy C20 Suburban

2-Piece Rear Main 305 LG4
Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy

1983 Chevy C20 Suburban

2-Piece Rear Main 305 LG4

1984 Chevy C20 Suburban

2-Piece Rear Main 305 LG4
Gen 1 L82 Small Block Chevy

1985 Chevy C20 Suburban

2-Piece Rear Main 305 LG4

1986 Chevy C20 Suburban

2-Piece Rear Main 305 LG4
Gen 1 L03 Small Block Chevy
Gen 1 L05 Small Block Chevy

1988-1995 Chevy C2500

Gen 1 L03 Small Block Chevy
Gen 1 L05 Small Block Chevy

1996 Chevy C2500

Gen 1 L03 Small Block Chevy
Gen 1 L05 Small Block Chevy
Vortec L30 Small Block Chevy
Vortec L31 Small Block Chevy

1997-1998 Chevy C2500

Gen 1 L05 Small Block Chevy
Vortec L30 Small Block Chevy
Vortec L31 Small Block Chevy

1999 Chevy C2500

Gen 1 L05 Small Block Chevy
Vortec L31 Small Block Chevy

1992-1995 Chevy C2500 Suburban

Gen 1 L05 Small Block Chevy

1996-1999 Chevy C2500 Suburban

Gen 1 L05 Small Block Chevy
Vortec L31 Small Block Chevy

1972-1977 Chevy C30

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy

1978-1979 Chevy C30

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
Gen 1 LG3 Small Block Chevy

1980-1982 Chevy C30

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy

1984 Chevy C30

Gen 1 L46 Small Block Chevy

1986 Chevy C30

2-Piece Rear Main 305 LG4
Gen 1 L03 Small Block Chevy
Gen 1 L05 Small Block Chevy

1983-1987 Chevy C35

Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy

1988-1995 Chevy C35

Gen 1 L05 Small Block Chevy

1996-1999 Chevy C35

Gen 1 L05 Small Block Chevy
Vortec L31 Small Block Chevy

1988-1995 Chevy C3500

Gen 1 L05 Small Block Chevy

1996-1999 Chevy C3500

Gen 1 L05 Small Block Chevy
Vortec L31 Small Block Chevy

1973-1975 Chevy Camaro

Gen 1 L48 Small Block Chevy

1976-1982 Chevy Camaro

Gen 1 L48 Small Block Chevy
Gen 1 LG3 Small Block Chevy

1983-1984 Chevy Camaro

2-Piece Rear Main 305 LG4

1985 Chevy Camaro

2-Piece Rear Main 305 LB9
2-Piece Rear Main 305 LG4
Gen 1 L69 Small Block Chevy

1986 Chevy Camaro

1-Piece Rear Main 305 LB9
2-Piece Rear Main 305 LG4

1987-1991 Chevy Camaro

1-Piece Rear Main 305 LB9
Gen 1 L98 Small Block Chevy

1992 Chevy Camaro

1-Piece Rear Main 305 LB9
Gen 1 L98 Small Block Chevy
Gen 2 LT1 Small Block Chevy

1993-1995 Chevy Camaro

Gen 2 LT1 Small Block Chevy

1996-1999 Chevy Camaro

Gen 2 LT1 Small Block Chevy
Vortec L31 Small Block Chevy

1973-1976 Chevy Caprice

Gen 1 L48 Small Block Chevy

1977 Chevy Caprice

Gen 1 L48 Small Block Chevy
Gen 1 LG3 Small Block Chevy

1978-1982 Chevy Caprice

2-Piece Rear Main 305 LG4
Gen 1 L48 Small Block Chevy

1983 Chevy Caprice

2-Piece Rear Main 305 LG4
2-Piece Rear Main Chevy 350

1984 Chevy Caprice

2-Piece Rear Main 305 LG4
Gen 1 L48 Small Block Chevy

1985 Chevy Caprice

2-Piece Rear Main 305 LG4
2-Piece Rear Main Chevy 350

1986 Chevy Caprice

2-Piece Rear Main 305 LG4
Gen 1 L03 Small Block Chevy
Gen 1 L05 Small Block Chevy

1987-1993 Chevy Caprice

Gen 1 L03 Small Block Chevy
Gen 1 L05 Small Block Chevy

1994-1995 Chevy Caprice

Gen 2 LT1 Small Block Chevy

1996 Chevy Caprice

Gen 2 LT1 Small Block Chevy
Vortec L31 Small Block Chevy

1973 Chevy Chevelle

Gen 1 L48 Small Block Chevy

1973-1974 Chevy Corvette

Gen 1 L48 Small Block Chevy

1980 Chevy Corvette

Gen 1 L48 Small Block Chevy
Gen 1 LG3 Small Block Chevy

1984 Chevy Corvette

Gen 1 L83 Small Block Chevy

1985 Chevy Corvette

2-Piece Rear Main Chevy 350

1986-1991 Chevy Corvette

Gen 1 L98 Small Block Chevy

1992-1995 Chevy Corvette

Gen 2 LT1 Small Block Chevy

1996 Chevy Corvette

Gen 2 LT1 Small Block Chevy
Vortec L31 Small Block Chevy

1973-1975 Chevy El Camino

Gen 1 L48 Small Block Chevy

1976-1977 Chevy El Camino

Gen 1 L48 Small Block Chevy
Gen 1 LG3 Small Block Chevy

1978-1979 Chevy El Camino

2-Piece Rear Main Chevy 350
Gen 1 LG3 Small Block Chevy

1980-1982 Chevy El Camino

Gen 1 LG3 Small Block Chevy

1983 Chevy El Camino

2-Piece Rear Main 305 LG4
2-Piece Rear Main Chevy 350

1984 Chevy El Camino

2-Piece Rear Main 305 LG4
Gen 1 L81 Small Block Chevy

1985 Chevy El Camino

2-Piece Rear Main 305 LG4

1986 Chevy El Camino

2-Piece Rear Main 305 LG4
Gen 1 L03 Small Block Chevy

1987 Chevy El Camino

Gen 1 L03 Small Block Chevy

1996-1999 Chevy Express 1500

Gen 1 L05 Small Block Chevy
Vortec L30 Small Block Chevy
Vortec L31 Small Block Chevy

2000-2002 Chevy Express 1500

Vortec L30 Small Block Chevy

1996 Chevy Express 2500

Gen 1 L05 Small Block Chevy
Vortec L30 Small Block Chevy
Vortec L31 Small Block Chevy

1997 Chevy Express 2500

Gen 2 LT1 Small Block Chevy
Vortec L30 Small Block Chevy
Vortec L31 Small Block Chevy

1998-1999 Chevy Express 2500

Gen 1 L05 Small Block Chevy
Vortec L30 Small Block Chevy
Vortec L31 Small Block Chevy

2000-2002 Chevy Express 2500

Vortec L30 Small Block Chevy

1996-1999 Chevy Express 3500

Gen 1 L05 Small Block Chevy
Vortec L31 Small Block Chevy

1975-1976 Chevy G10

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy

1977-1982 Chevy G10

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
Gen 1 LG3 Small Block Chevy

1983 Chevy G10

2-Piece Rear Main 305 LG4

1984 Chevy G10

2-Piece Rear Main 305 LG4
Gen 1 L82 Small Block Chevy

1985 Chevy G10

2-Piece Rear Main 305 LG4

1986 Chevy G10

2-Piece Rear Main 305 LG4
Gen 1 L03 Small Block Chevy
Gen 1 L05 Small Block Chevy

1987-1993 Chevy G10

Gen 1 L03 Small Block Chevy
Gen 1 L05 Small Block Chevy

1994-1995 Chevy G10

Gen 1 L03 Small Block Chevy

1970 Chevy G10 Van

2-Piece Rear Main Chevy 350

1972-1974 Chevy G10 Van

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy

1975-1976 Chevy G20

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L82 Small Block Chevy

1977-1982 Chevy G20

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L82 Small Block Chevy
Gen 1 LG3 Small Block Chevy

1983-1985 Chevy G20

2-Piece Rear Main 305 LG4

1986 Chevy G20

2-Piece Rear Main 305 LG4
Gen 1 L03 Small Block Chevy
Gen 1 L05 Small Block Chevy

1987-1995 Chevy G20

Gen 1 L03 Small Block Chevy
Gen 1 L05 Small Block Chevy

1972 Chevy G20 Van

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy

1973-1974 Chevy G20 Van

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L82 Small Block Chevy

1975-1977 Chevy G30

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy

1978-1979 Chevy G30

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 LG3 Small Block Chevy

1980-1981 Chevy G30

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy

1982 Chevy G30

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 LG3 Small Block Chevy

1985 Chevy G30

2-Piece Rear Main 305 LG4

1986-1995 Chevy G30

Gen 1 L05 Small Block Chevy

1996 Chevy G30

Gen 1 L05 Small Block Chevy
Vortec L31 Small Block Chevy

1970 Chevy G30 Van

2-Piece Rear Main Chevy 350

1972-1974 Chevy G30 Van

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy

1973-1976 Chevy Impala

Gen 1 L48 Small Block Chevy

1977-1982 Chevy Impala

Gen 1 L48 Small Block Chevy
Gen 1 LG3 Small Block Chevy

1983 Chevy Impala

2-Piece Rear Main 305 LG4
2-Piece Rear Main Chevy 350

1984 Chevy Impala

2-Piece Rear Main 305 LG4

1985 Chevy Impala

2-Piece Rear Main 305 LG4
2-Piece Rear Main Chevy 350

1994-1995 Chevy Impala

Gen 2 LT1 Small Block Chevy

1996 Chevy Impala

Gen 2 LT1 Small Block Chevy
Vortec L31 Small Block Chevy

1972-1976 Chevy K10

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy

1977-1979 Chevy K10

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
Gen 1 LG3 Small Block Chevy

1980 Chevy K10

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy

1981-1982 Chevy K10

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
Gen 1 LG3 Small Block Chevy

1983-1985 Chevy K10

2-Piece Rear Main 305 LG4

1986 Chevy K10

2-Piece Rear Main 305 LG4
Gen 1 L03 Small Block Chevy
Gen 1 L05 Small Block Chevy

1972-1975 Chevy K10 Suburban

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy

1976-1982 Chevy K10 Suburban

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
Gen 1 LG3 Small Block Chevy

1983-1985 Chevy K10 Suburban

2-Piece Rear Main 305 LG4

1986 Chevy K10 Suburban

2-Piece Rear Main 305 LG4
Gen 1 L03 Small Block Chevy
Gen 1 L05 Small Block Chevy

1988-1995 Chevy K1500

Gen 1 L03 Small Block Chevy
Gen 1 L05 Small Block Chevy

1996-1999 Chevy K1500

Gen 1 L05 Small Block Chevy
Vortec L30 Small Block Chevy
Vortec L31 Small Block Chevy

1992-1995 Chevy K1500 Suburban

Gen 1 L05 Small Block Chevy

1996-1999 Chevy K1500 Suburban

Gen 1 L05 Small Block Chevy
Vortec L31 Small Block Chevy

1972-1976 Chevy K20

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy

1977-1978 Chevy K20

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
Gen 1 LG3 Small Block Chevy

1979 Chevy K20

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy

1980 Chevy K20

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
Gen 1 LG3 Small Block Chevy

1981-1982 Chevy K20

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy

1985 Chevy K20

2-Piece Rear Main 305 LG4

1986 Chevy K20

Gen 1 L05 Small Block Chevy

1972-1976 Chevy K20 Suburban

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy

1977-1978 Chevy K20 Suburban

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
Gen 1 LG3 Small Block Chevy

1979-1982 Chevy K20 Suburban

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy

1985 Chevy K20 Suburban

2-Piece Rear Main 305 LG4

1986 Chevy K20 Suburban

2-Piece Rear Main 305 LG4
Gen 1 L03 Small Block Chevy
Gen 1 L05 Small Block Chevy

1988-1995 Chevy K2500

Gen 1 L03 Small Block Chevy
Gen 1 L05 Small Block Chevy

1996 Chevy K2500

Gen 1 L05 Small Block Chevy
Vortec L31 Small Block Chevy

1997-1998 Chevy K2500

Gen 1 L05 Small Block Chevy
Vortec L30 Small Block Chevy
Vortec L31 Small Block Chevy

1999 Chevy K2500

Gen 1 L05 Small Block Chevy
Vortec L31 Small Block Chevy

1992-1995 Chevy K2500 Suburban

Gen 1 L05 Small Block Chevy

1996-1999 Chevy K2500 Suburban

Gen 1 L05 Small Block Chevy
Vortec L31 Small Block Chevy

1972-1974 Chevy K30

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy

1977-1982 Chevy K30

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy

1986 Chevy K30

Gen 1 L05 Small Block Chevy

1988-1995 Chevy K3500

Gen 1 L05 Small Block Chevy

1996-1999 Chevy K3500

Gen 1 L05 Small Block Chevy
Vortec L31 Small Block Chevy

1970-1974 Chevy K5 Blazer

2-Piece Rear Main Chevy 350

1975-1976 Chevy K5 Blazer

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy

1977-1981 Chevy K5 Blazer

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy
Gen 1 LG3 Small Block Chevy

1982 Chevy K5 Blazer

2-Piece Rear Main 305 LG4
Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy

1983 Chevy K5 Blazer

2-Piece Rear Main 305 LG4
2-Piece Rear Main Chevy 350

1984 Chevy K5 Blazer

2-Piece Rear Main 305 LG4
Gen 1 L48 Small Block Chevy

1985 Chevy K5 Blazer

2-Piece Rear Main 305 LG4
2-Piece Rear Main Chevy 350

1986 Chevy K5 Blazer

2-Piece Rear Main 305 LG4
Gen 1 L03 Small Block Chevy
Gen 1 L05 Small Block Chevy

1973-1975 Chevy Laguna

Gen 1 L48 Small Block Chevy

1976 Chevy Laguna

2-Piece Rear Main Chevy 350
Gen 1 LG3 Small Block Chevy

1973-1975 Chevy Malibu

Gen 1 L48 Small Block Chevy

1976-1982 Chevy Malibu

Gen 1 L48 Small Block Chevy
Gen 1 LG3 Small Block Chevy

1983 Chevy Malibu

2-Piece Rear Main 305 LG4

1970-1971 Chevy Monte Carlo

2-Piece Rear Main Chevy 350

1973-1975 Chevy Monte Carlo

2-Piece Rear Main Chevy 350

1976-1977 Chevy Monte Carlo

Gen 1 L48 Small Block Chevy
Gen 1 LG3 Small Block Chevy

1978-1981 Chevy Monte Carlo

2-Piece Rear Main 305 LG4

1982-1983 Chevy Monte Carlo

2-Piece Rear Main 305 LG4
2-Piece Rear Main Chevy 350

1984-1985 Chevy Monte Carlo

2-Piece Rear Main 305 LG4

1986 Chevy Monte Carlo

2-Piece Rear Main 305 LG4
Gen 1 L03 Small Block Chevy

1987-1988 Chevy Monte Carlo

Gen 1 L03 Small Block Chevy

1975 Chevy Monza

Gen 1 L48 Small Block Chevy

1976-1979 Chevy Monza

Gen 1 LG3 Small Block Chevy

1973-1974 Chevy Nova

Gen 1 L48 Small Block Chevy

1975 Chevy Nova

2-Piece Rear Main Chevy 350

1976-1979 Chevy Nova

Gen 1 L48 Small Block Chevy
Gen 1 LG3 Small Block Chevy

1975-1979 Chevy P30

Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy

1980-1983 Chevy P30

2-Piece Rear Main Chevy 350

1985 Chevy P30

2-Piece Rear Main Chevy 350

1986-1995 Chevy P30

Gen 1 L05 Small Block Chevy

1996-1999 Chevy P30

Gen 1 L05 Small Block Chevy
Vortec L31 Small Block Chevy

1970 Chevy P30 Van

2-Piece Rear Main Chevy 350

1972 Chevy P30 Van

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy

1973-1974 Chevy P30 Van

Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy

1987 Chevy R10

Gen 1 L03 Small Block Chevy
Gen 1 L05 Small Block Chevy

1987 Chevy R10 Suburban

Gen 1 L03 Small Block Chevy
Gen 1 L05 Small Block Chevy

1988 Chevy R10 Suburban

Gen 1 L05 Small Block Chevy

1989-1991 Chevy R1500 Suburban

Gen 1 L05 Small Block Chevy

1987 Chevy R20

Gen 1 L03 Small Block Chevy
Gen 1 L05 Small Block Chevy

1988 Chevy R20

Gen 1 L05 Small Block Chevy

1987-1988 Chevy R20 Suburban

Gen 1 L05 Small Block Chevy

1995 Chevy R25

Gen 1 L05 Small Block Chevy

1996-1999 Chevy R25

Gen 1 L05 Small Block Chevy
Vortec L31 Small Block Chevy

1989 Chevy R2500

Gen 1 L05 Small Block Chevy

1989-1991 Chevy R2500 Suburban

Gen 1 L05 Small Block Chevy

1987-1988 Chevy R30

Gen 1 L05 Small Block Chevy

1989-1991 Chevy R3500

Gen 1 L05 Small Block Chevy

1995 Chevy Silverado

Gen 1 L05 Small Block Chevy

1996-1999 Chevy Silverado

Gen 1 L05 Small Block Chevy
Vortec L31 Small Block Chevy

1987-1994 Chevy Suburban

Gen 1 L05 Small Block Chevy

1995 Chevy Suburban 1500

Gen 1 L05 Small Block Chevy

1996-1999 Chevy Suburban 1500

Gen 1 L05 Small Block Chevy
Vortec L31 Small Block Chevy

1995 Chevy Tahoe

Gen 1 L05 Small Block Chevy

1996-1999 Chevy Tahoe

Gen 1 L05 Small Block Chevy
Vortec L31 Small Block Chevy

1987 Chevy V10

Gen 1 L03 Small Block Chevy
Gen 1 L05 Small Block Chevy

1987-1988 Chevy V10 Suburban

Gen 1 L05 Small Block Chevy

1989-1991 Chevy V1500 Suburban

Gen 1 L05 Small Block Chevy

1987 Chevy V20

Gen 1 L05 Small Block Chevy

1987-1988 Chevy V20 Suburban

Gen 1 L05 Small Block Chevy

1989-1991 Chevy V2500 Suburban

Gen 1 L05 Small Block Chevy

1987-1988 Chevy V30

Gen 1 L05 Small Block Chevy

1989-1991 Chevy V3500

Gen 1 L05 Small Block Chevy

1963-1965 GMC 1000 Series

Gen 1 LE9 Small Block Chevy

1967 GMC C15/C1500 Suburban

2-Piece Rear Main Chevy 350

1980-1984 GMC C1500

2-Piece Rear Main Chevy 350

1998-1999 GMC C1500

Vortec L31 Small Block Chevy

1980-1986 GMC C1500 Suburban

2-Piece Rear Main Chevy 350

1992-1999 GMC C1500 Suburban

Vortec L31 Small Block Chevy

1967-1972 GMC C25/C2500 Pickup

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy

1967-1972 GMC C25/C2500 Suburban

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy

1967-1974 GMC C35/C3500 Pickup

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy

1978-1987 GMC Caballero

2-Piece Rear Main Chevy 350

1975-1978 GMC G15

2-Piece Rear Main Chevy 350

1967-1974 GMC G15/G1500 Van

2-Piece Rear Main Chevy 350

1979-1986 GMC G1500

2-Piece Rear Main Chevy 350

1987-1995 GMC G1500

Gen 1 L05 Small Block Chevy

1975-1978 GMC G25

2-Piece Rear Main Chevy 350

1967-1974 GMC G25/G2500 Van

2-Piece Rear Main Chevy 350

1979-1986 GMC G2500

2-Piece Rear Main Chevy 350

1987-1995 GMC G2500

Gen 1 L05 Small Block Chevy

1975-1978 GMC G35

2-Piece Rear Main Chevy 350

1967 GMC G35/G3500 Van

2-Piece Rear Main Chevy 350

1970-1974 GMC G35/G3500 Van

2-Piece Rear Main Chevy 350

1979-1986 GMC G3500

2-Piece Rear Main Chevy 350

1987-1994 GMC G3500

Gen 1 L05 Small Block Chevy

1995-1996 GMC G3500

Gen 1 L05 Small Block Chevy
Gen 1 L98 Small Block Chevy

1970-1973 GMC Jimmy

Gen 1 LE9 Small Block Chevy

1974-1977 GMC Jimmy

2-Piece Rear Main Chevy 350

1978-1982 GMC Jimmy

Gen 1 LE9 Small Block Chevy

1983-1984 GMC Jimmy

2-Piece Rear Main Chevy 350

1986 GMC Jimmy

Gen 1 L05 Small Block Chevy

1987 GMC Jimmy

Gen 1 L03 Small Block Chevy
Gen 1 L05 Small Block Chevy
Gen 1 L98 Small Block Chevy

1988-1990 GMC Jimmy

Gen 1 L05 Small Block Chevy

1975-1978 GMC K15

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy

1975-1978 GMC K15 Suburban

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy

1967-1974 GMC K15/K1500 Pickup

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy

1967-1974 GMC K15/K1500 Suburban

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy

1979-1984 GMC K1500

2-Piece Rear Main Chevy 350

1998-1999 GMC K1500

Vortec L31 Small Block Chevy

1979-1980 GMC K1500 Suburban

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy

1981-1986 GMC K1500 Suburban

Gen 1 L05 Small Block Chevy
Gen 1 L98 Small Block Chevy

1992-1999 GMC K1500 Suburban

Vortec L31 Small Block Chevy

1975-1978 GMC K25

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy

1975-1978 GMC K25 Suburban

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy

1967-1974 GMC K25/K2500 Pickup

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy

1967-1974 GMC K25/K2500 Suburban

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy

1979-1984 GMC K2500

2-Piece Rear Main Chevy 350

1986 GMC K2500

Gen 1 L05 Small Block Chevy

1996-2000 GMC K2500

Vortec L31 Small Block Chevy

1979-1986 GMC K2500 Suburban

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy

1992-1993 GMC K2500 Suburban

Gen 1 L05 Small Block Chevy

1994-1999 GMC K2500 Suburban

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy

1967-1974 GMC K35/K3500 Pickup

Gen 1 L46 Small Block Chevy
Gen 1 L48 Small Block Chevy
Gen 1 L65 Small Block Chevy
Gen 1 L81 Small Block Chevy
Gen 1 L82 Small Block Chevy

1987 GMC R1500 Suburban

Vortec L31 Small Block Chevy

1988-1991 GMC R1500 Suburban

Gen 1 L98 Small Block Chevy

1996-2000 GMC Savana 1500

Vortec L31 Small Block Chevy

1973-1977 GMC Sprint

Gen 1 LM1 Small Block Chevy

1960-1966 GMC Suburban

Gen 1 L69 Small Block Chevy

1967 GMC Suburban

Gen 1 L46 Small Block Chevy

1987-1991 GMC V1500 Suburban

350 Chevy Small Block V8
Gen 1 L05 Small Block Chevy
Gen 1 L98 Small Block Chevy

1987 GMC V2500

350 Chevy Small Block V8
Gen 1 L05 Small Block Chevy
Gen 1 L98 Small Block Chevy

1987-1991 GMC V2500 Suburban

350 Chevy Small Block V8
Gen 1 L05 Small Block Chevy
Gen 1 L98 Small Block Chevy

1987-1991 GMC V3500

350 Chevy Small Block V8

1992-2011 GMC Yukon

Vortec L31 Small Block Chevy

1975-1977 Oldsmobile Starfire

305 Chevy Small Block V8

1985 Pontiac Firebird

2-Piece Rear Main 305 LB9
2-Piece Rear Main 305 LG4
Gen 1 L69 Small Block Chevy