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Flowtech 11112FLT Long Tube Header, 1.625 Inch Tube Size

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#42511112FLT

Flowtech 11112FLT Long Tube Header, 1.625 Inch Tube Size

Name: Flowtech 11112FLT Long Tube Header, 1.625 Inch Tube Size
Brand: Flowtech Exhaust
SKU: 42511112FLT
Price: 268.95 USD
Availability: InStock

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4 Questions

$268.95

/set

Factory Shipped

$299.95

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Product Summary

Long Tube Header Tube Type, Round Exhaust Port Shape

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Key Specs

MFG. Part #	11112FLT
Header Tube Type	Long Tube
Exhaust Port Shape	Round
Flange Style	Standard
Primary Tube Diameter	1-5/8"

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Need To Know

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855.313.9176

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Flowtech Exhaust 11112FLT Details

Flowtech headers are the perfect combination of performance and value. Flowtech long tube headers are precision engineered using mandrel bent tubing, formed collectors and 5/16" flanges with sealing rings for a leak-free seal. All mounting hardware and gaskets are included for a simple installation. This header is coated in a high heat resistant black paint for a stealthy appearance.

Fuel Economy From The Engine
Leak Test For Max Performance
Mandrel-Formed Power Plenum
Leakproof O-Ringed Port Seals
Include All Mounting Hardware
Constructed of .049 cold roll flash mild steel tubing

Application

1955 Chevy Bel Air
1956 Chevy Bel Air
1957 Chevy Bel Air

Charts

Installation Instructions (PDF)

Rebates

Holley October Promo 10% Off Select Parts Sale

Holley's October Promo 10% Off Select Parts Sale, running from September 28, 2026, through November 1, 2026. For a limited time, customers can save up to 10% off on select Holley parts, making it the perfect opportunity to upgrade your ride with premium Holley branded parts including Holley, Brawler, Quick Fuel, Leg Wheels, Rev Wheels, Rocket Racing, Flowtech, Edge, Racequip, Apr and Dinan. Purchases must be made between September 28, 2026, through November 1, 2026. This limited-time offer applies to qualifying Holley branded parts purchased during the promotional period. Following the promotion, these parts will revert back to standard pricing.

Guides & Documents

Headers Installation Instructions (42511112FLT)

CARB Warning

For race/ off road use only

Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway. 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.

CARB warning

Flowtech Exhaust 11112FLT Specifications

KEY SPECS
MFG. Part #	11112FLT
Brand	Flowtech Exhaust
Header Tube Type	Long Tube
Exhaust Port Shape	Round
Flange Style	Standard
Primary Tube Diameter	1-5/8"
Material Type	Steel
Color	Black
Weld-Up	No
Collector Diameter	3 Inch
Finish	Painted
Hardware Included	Yes
Gasket(s) Included	Yes
Collector Reducers Included	Yes
Collector Reducer Exit Diameter	2.5"
Collector Attachment Type	3-bolt flange

GENERAL
Sold in Quantity	Pair
GTIN Code	787480111128
Emission Code	3

Ratings & Reviews

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Questions & Answers

4 Questions • 6 Answers

Sort Questions

does it work with stock steering

by john

• 7 years ago

3 answers

View Answers

Will these headers work on a 55 Chevy with side motor mounts, standard transmission, and CPP's 500 series power steering box?

by Bill

• 10 years ago

1 answer

View Answer

Will it work with stock clutch linkage

by Milkman

• 10 years ago

1 answer

View Answer

are the headers for a big block or small block.will they fit a a 1956 with a big block. with a 4 speed trans and stock motor and trans mounts. thanks Donnie ariks

by donnie

• 10 years ago

1 answer

View Answer

4 of 4 questions shown

Fitment

1959 Chevy 3A

2-Piece Rear Main Chevy 283

1959 Chevy 3B

2-Piece Rear Main Chevy 283

1959 Chevy 3C

2-Piece Rear Main Chevy 283

1959 Chevy 3D

2-Piece Rear Main Chevy 283

1959 Chevy 3E

2-Piece Rear Main Chevy 283

1959 Chevy 3F

2-Piece Rear Main Chevy 283

1959 Chevy 3G

2-Piece Rear Main Chevy 283

1957 Chevy Bel Air

2-Piece Rear Main Chevy 265
2-Piece Rear Main Chevy 283

1958-1967 Chevy Bel Air

2-Piece Rear Main Chevy 283

1968 Chevy Bel Air

Gen 1 L14 Small Block Chevy

1970-1975 Chevy Bel Air

2-Piece Rear Main Chevy 400

1958-1967 Chevy Biscayne

2-Piece Rear Main Chevy 283

1968 Chevy Biscayne

Gen 1 L14 Small Block Chevy

1970-1972 Chevy Biscayne

2-Piece Rear Main Chevy 400

1969-1973 Chevy Blazer

Gen 1 L14 Small Block Chevy

1958-1961 Chevy Brookwood

2-Piece Rear Main Chevy 283

1969 Chevy Brookwood

Gen 1 L14 Small Block Chevy

1970-1972 Chevy Brookwood

2-Piece Rear Main Chevy 400
Gen 1 L14 Small Block Chevy

1960-1967 Chevy C10

2-Piece Rear Main Chevy 283

1968-1973 Chevy C10

Gen 1 L14 Small Block Chevy

1976-1980 Chevy C10

2-Piece Rear Main Chevy 400

1960-1967 Chevy C10 Suburban

2-Piece Rear Main Chevy 283

1968-1973 Chevy C10 Suburban

Gen 1 L14 Small Block Chevy

1960-1967 Chevy C20

2-Piece Rear Main Chevy 283

1968-1973 Chevy C20

Gen 1 L14 Small Block Chevy

1976-1980 Chevy C20

2-Piece Rear Main Chevy 400

1960-1967 Chevy C20 Suburban

2-Piece Rear Main Chevy 283

1968-1973 Chevy C20 Suburban

Gen 1 L14 Small Block Chevy

1976-1980 Chevy C20 Suburban

2-Piece Rear Main Chevy 400

1960-1967 Chevy C30

2-Piece Rear Main Chevy 283

1968-1973 Chevy C30

Gen 1 L14 Small Block Chevy

1976-1979 Chevy C30

2-Piece Rear Main Chevy 400

1967-1968 Chevy Camaro

Gen 1 DZ Small Block Chevy

1969 Chevy Camaro

Gen 1 DZ Small Block Chevy
Gen 1 L14 Small Block Chevy

1970-1973 Chevy Camaro

Gen 1 L14 Small Block Chevy

1980-1981 Chevy Camaro

2-Piece Rear Main Chevy 267

1966-1967 Chevy Caprice

2-Piece Rear Main Chevy 283

1968-1969 Chevy Caprice

Gen 1 L14 Small Block Chevy

1970-1973 Chevy Caprice

2-Piece Rear Main Chevy 400
Gen 1 L14 Small Block Chevy

1974-1976 Chevy Caprice

2-Piece Rear Main Chevy 400

1980-1982 Chevy Caprice

2-Piece Rear Main Chevy 267

1964-1967 Chevy Chevelle

2-Piece Rear Main Chevy 283

1968-1969 Chevy Chevelle

Gen 1 L14 Small Block Chevy

1970-1973 Chevy Chevelle

2-Piece Rear Main Chevy 400
Gen 1 L14 Small Block Chevy

1963-1967 Chevy Chevy II

2-Piece Rear Main Chevy 283

1968 Chevy Chevy II

Gen 1 L14 Small Block Chevy

1957-1961 Chevy Corvette

2-Piece Rear Main Chevy 283

1957 Chevy Del Ray

2-Piece Rear Main Chevy 265
2-Piece Rear Main Chevy 283

1958 Chevy Del Ray

2-Piece Rear Main Chevy 283

1959-1960 Chevy El Camino

2-Piece Rear Main Chevy 283

1964-1967 Chevy El Camino

2-Piece Rear Main Chevy 283

1968-1969 Chevy El Camino

Gen 1 L14 Small Block Chevy

1970-1973 Chevy El Camino

2-Piece Rear Main Chevy 400
Gen 1 L14 Small Block Chevy

1974-1976 Chevy El Camino

2-Piece Rear Main Chevy 400

1979-1982 Chevy El Camino

2-Piece Rear Main Chevy 267

1969 Chevy Estate

Gen 1 L14 Small Block Chevy

1970 Chevy Estate

2-Piece Rear Main Chevy 400
Gen 1 L14 Small Block Chevy

1976 Chevy G10

2-Piece Rear Main Chevy 400

1968-1973 Chevy G10 Van

Gen 1 L14 Small Block Chevy

1975-1980 Chevy G20

2-Piece Rear Main Chevy 400

1967 Chevy G20 Van

2-Piece Rear Main Chevy 283

1968-1973 Chevy G20 Van

Gen 1 L14 Small Block Chevy

1975-1980 Chevy G30

2-Piece Rear Main Chevy 400

1958-1967 Chevy Impala

2-Piece Rear Main Chevy 283

1968-1969 Chevy Impala

Gen 1 L14 Small Block Chevy

1970-1973 Chevy Impala

2-Piece Rear Main Chevy 400
Gen 1 L14 Small Block Chevy

1974-1976 Chevy Impala

2-Piece Rear Main Chevy 400

1980-1982 Chevy Impala

2-Piece Rear Main Chevy 267

1960-1967 Chevy K10

2-Piece Rear Main Chevy 283

1968-1973 Chevy K10

Gen 1 L14 Small Block Chevy

1975-1980 Chevy K10

2-Piece Rear Main Chevy 400

1960-1967 Chevy K10 Suburban

2-Piece Rear Main Chevy 283

1968-1973 Chevy K10 Suburban

Gen 1 L14 Small Block Chevy

1975-1979 Chevy K10 Suburban

2-Piece Rear Main Chevy 400

1960-1967 Chevy K20

2-Piece Rear Main Chevy 283

1968-1973 Chevy K20

Gen 1 L14 Small Block Chevy

1975-1980 Chevy K20

2-Piece Rear Main Chevy 400

1967 Chevy K20 Panel

2-Piece Rear Main Chevy 283

1960-1967 Chevy K20 Suburban

2-Piece Rear Main Chevy 283

1968-1973 Chevy K20 Suburban

Gen 1 L14 Small Block Chevy

1975-1980 Chevy K20 Suburban

2-Piece Rear Main Chevy 400

1968-1973 Chevy K30

Gen 1 L14 Small Block Chevy

1977-1980 Chevy K30

2-Piece Rear Main Chevy 400

1975-1979 Chevy K5 Blazer

2-Piece Rear Main Chevy 400

1959-1961 Chevy Kingswood

2-Piece Rear Main Chevy 283

1969 Chevy Kingswood

Gen 1 L14 Small Block Chevy

1970-1972 Chevy Kingswood

2-Piece Rear Main Chevy 400
Gen 1 L14 Small Block Chevy

1973 Chevy Laguna

2-Piece Rear Main Chevy 400
Gen 1 L14 Small Block Chevy

1974-1976 Chevy Laguna

2-Piece Rear Main Chevy 400

1964-1967 Chevy Malibu

2-Piece Rear Main Chevy 283

1973 Chevy Malibu

2-Piece Rear Main Chevy 400
Gen 1 L14 Small Block Chevy

1974-1976 Chevy Malibu

2-Piece Rear Main Chevy 400

1979-1982 Chevy Malibu

2-Piece Rear Main Chevy 267

1970-1976 Chevy Monte Carlo

2-Piece Rear Main Chevy 400

1979-1982 Chevy Monte Carlo

2-Piece Rear Main Chevy 267

1957 Chevy Nomad

2-Piece Rear Main Chevy 265
2-Piece Rear Main Chevy 283

1958-1961 Chevy Nomad

2-Piece Rear Main Chevy 283

1969-1973 Chevy Nova

Gen 1 L14 Small Block Chevy

1957 Chevy One-Fifty Series

2-Piece Rear Main Chevy 265
2-Piece Rear Main Chevy 283

1976 Chevy P30

2-Piece Rear Main Chevy 400

1961-1962 Chevy P30 Series

2-Piece Rear Main Chevy 283

1968-1969 Chevy P30 Van

Gen 1 L14 Small Block Chevy

1973 Chevy P30 Van

Gen 1 L14 Small Block Chevy

1959-1961 Chevy Parkwood

2-Piece Rear Main Chevy 283

1957 Chevy Sedan Delivery

2-Piece Rear Main Chevy 265
2-Piece Rear Main Chevy 283

1958 Chevy Sedan Delivery

2-Piece Rear Main Chevy 283

1947-1959 Chevy Suburban

2-Piece Rear Main Chevy 265

1960-1967 Chevy Suburban

2-Piece Rear Main Chevy 283

1969 Chevy Townsman

Gen 1 L14 Small Block Chevy

1970-1972 Chevy Townsman

2-Piece Rear Main Chevy 400
Gen 1 L14 Small Block Chevy

1955 Chevy Truck

2-Piece Rear Main Chevy 265

1957 Chevy Truck

2-Piece Rear Main Chevy 265
2-Piece Rear Main Chevy 283

1958 Chevy Truck

2-Piece Rear Main Chevy 283

1960 Chevy Truck

2-Piece Rear Main Chevy 283

1955 Chevy Two-Ten Series

2-Piece Rear Main Chevy 265

1957 Chevy Two-Ten Series

2-Piece Rear Main Chevy 265
2-Piece Rear Main Chevy 283

1958 Chevy Yeoman

2-Piece Rear Main Chevy 283

1966 GMC 1000

2-Piece Rear Main Chevy 283

1960 GMC 1000 Series

2-Piece Rear Main Chevy 283

1962-1965 GMC 1000 Series

2-Piece Rear Main Chevy 283

1960-1965 GMC 1500 Series

2-Piece Rear Main Chevy 283

1966 GMC 2500

2-Piece Rear Main Chevy 283

1960-1965 GMC 2500 Series

2-Piece Rear Main Chevy 283

1960-1966 GMC 3000

2-Piece Rear Main Chevy 283

1960-1966 GMC 3500

2-Piece Rear Main Chevy 283

1967 GMC C25/C2500 Pickup

2-Piece Rear Main Chevy 283

1968-1972 GMC C25/C2500 Pickup

Gen 1 L14 Small Block Chevy

1967 GMC C25/C2500 Suburban

2-Piece Rear Main Chevy 283

1968-1972 GMC C25/C2500 Suburban

Gen 1 L14 Small Block Chevy

1967 GMC C35/C3500 Pickup

2-Piece Rear Main Chevy 283

1968-1972 GMC C35/C3500 Pickup

Gen 1 L14 Small Block Chevy

1973-1974 GMC C35/C3500 Pickup

2-Piece Rear Main Chevy 400

1975-1978 GMC K15

2-Piece Rear Main Chevy 400

1975-1978 GMC K15 Suburban

2-Piece Rear Main Chevy 400

1967-1974 GMC K15/K1500 Pickup

2-Piece Rear Main Chevy 400

1967-1974 GMC K15/K1500 Suburban

2-Piece Rear Main Chevy 400

1979-1980 GMC K1500 Suburban

2-Piece Rear Main Chevy 400

1975-1978 GMC K25

2-Piece Rear Main Chevy 400

1975-1978 GMC K25 Suburban

2-Piece Rear Main Chevy 400

1967 GMC K25/K2500 Pickup

2-Piece Rear Main Chevy 283

1968-1972 GMC K25/K2500 Pickup

Gen 1 L14 Small Block Chevy

1973-1974 GMC K25/K2500 Pickup

2-Piece Rear Main Chevy 400

1967 GMC K25/K2500 Suburban

2-Piece Rear Main Chevy 283

1968-1972 GMC K25/K2500 Suburban

Gen 1 L14 Small Block Chevy

1973-1974 GMC K25/K2500 Suburban

2-Piece Rear Main Chevy 400

1979-1986 GMC K2500 Suburban

2-Piece Rear Main Chevy 400

1967 GMC K35/K3500 Pickup

2-Piece Rear Main Chevy 283

1968-1972 GMC K35/K3500 Pickup

Gen 1 L14 Small Block Chevy

1973-1974 GMC K35/K3500 Pickup

2-Piece Rear Main Chevy 400

1966 GMC P1000

2-Piece Rear Main Chevy 283

1973-1977 GMC Sprint

2-Piece Rear Main Chevy 400

1955-1959 GMC Suburban

2-Piece Rear Main Chevy 265
2-Piece Rear Main Chevy 283

1960-1966 GMC Suburban

2-Piece Rear Main Chevy 283

1967 GMC Suburban

Gen 1 L14 Small Block Chevy

1955 GMC Truck

2-Piece Rear Main Chevy 265

1956-1960 GMC Truck

2-Piece Rear Main Chevy 265
2-Piece Rear Main Chevy 283

1965-1966 Studebaker Commander

2-Piece Rear Main Chevy 283

1965-1966 Studebaker Cruiser

2-Piece Rear Main Chevy 283

1965-1966 Studebaker Daytona

2-Piece Rear Main Chevy 283

1966 Studebaker Wagonaire

2-Piece Rear Main Chevy 283