-9%

Doug's Headers D303Y-B Tri-Y Header, 1-3/4 In, 68-87 Chevy Truck, Blk

-9%

#447D303YB

Doug's Headers D303Y-B Tri-Y Header, 1-3/4 In, 68-87 Chevy Truck, Blk

Name: Doug's Headers D303Y-B Tri-Y Header, 1-3/4 In, 68-87 Chevy Truck, Blk
Brand: Doug's Headers
SKU: 447D303YB
Price: 808.75 USD
Availability: InStock

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2 Questions

Finish:

Painted

Ceramic Coated

$808.75

/set

Factory Shipped

$889.63

Save $80.88

Quantity

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Product Summary

Tri-Y Header Tube Type, Standard Flange Style, Steel

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Key Specs

MFG. Part #	D303Y-B
Header Tube Type	Tri-Y
Flange Style	Standard
Primary Tube Diameter	1-3/4"
Material Type	Steel

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Need To Know

Need help?

855.313.9176

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Quick and Easy Returns

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Doug's Headers D303Y-B Details

3/8" Thick machined flanges...no warping
CNC mandrel bent tubes... accurate fit & better flow
Tri-Y headers yield maximum power from off idle to 4500 RPM making them well suited for applications demanding maximum mid-range torque with maximum fuel economy
Heavy 16 gauge tubing...longer life
Tubes are pre-polished to remove scratches and the header is finished with a Hi-Temp Black Coating

Doug's Headers D303Y-B 1 3/4" Tri-Y Header Chevrolet Truck Big Block Chevrolet 68-87 Hi-Temp Black Coating
Fits Automatic Transmissions

Doug's Headers D303Y-B 1 3/4" Tri-Y Header Chevrolet Truck Big Block Chevrolet 68-87 Hi-Temp Black Coating
Fits Automatic Transmissions

Guides & Documents

Choosing the Right Headers

Headers Installation Instructions (447D303YB)

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

Doug's Headers D303Y-B Specifications

KEY SPECS
MFG. Part #	D303Y-B
Brand	Doug's Headers
Header Tube Type	Tri-Y
Flange Style	Standard
Primary Tube Diameter	1-3/4"
Material Type	Steel
Color	Black
Weld-Up	No
Collector Diameter	2-1/2 Inch
Finish	Hi-Temp Black
Hardware Included	Yes
Gasket(s) Included	Yes

GENERAL
Sold in Quantity	Pair
GTIN Code	694342543006

Ratings & Reviews

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Questions & Answers

2 Questions • 2 Answers

Sort Questions

Do you have headers that would fit a 1986 K30 with a big block , 4 speed manual transmission , power brakes and power steering ?

by Roger

• 6 years ago

1 answer

View Answer

Do these headers hang below the bottom of the frame rail? I have a lowered 72 C10 that ground clearance is a concern with.

by Mark

• 8 years ago

1 answer

View Answer

2 of 2 questions shown

Fitment

1965-1969 Chevy Bel Air

396 Chevy Big Block V8

1970-1972 Chevy Bel Air

402 Chevy Big Block V8
454 Chevy Big Block V8

1973-1975 Chevy Bel Air

454 Chevy Big Block V8

1965-1969 Chevy Biscayne

396 Chevy Big Block V8

1970-1972 Chevy Biscayne

402 Chevy Big Block V8
454 Chevy Big Block V8

1969 Chevy Brookwood

396 Chevy Big Block V8

1970-1972 Chevy Brookwood

402 Chevy Big Block V8
454 Chevy Big Block V8

1969 Chevy C10

396 Chevy Big Block V8

1970-1972 Chevy C10

402 Chevy Big Block V8

1973-1979 Chevy C10

454 Chevy Big Block V8

1968-1969 Chevy C10 Suburban

396 Chevy Big Block V8

1970-1972 Chevy C10 Suburban

402 Chevy Big Block V8

1973-1979 Chevy C10 Suburban

454 Chevy Big Block V8

1988 Chevy C15

454 Chevy Big Block V8

1990 Chevy C1500

454 Chevy Big Block V8

1991 Chevy C1500

Chevy Big Block V8 Gen 5 454 L19
Chevy Big Block V8 Mark IV 454 LS5

1992-1993 Chevy C1500

454 Chevy Big Block V8

1968-1969 Chevy C20

396 Chevy Big Block V8

1970-1972 Chevy C20

402 Chevy Big Block V8

1973-1987 Chevy C20

454 Chevy Big Block V8

1968-1969 Chevy C20 Suburban

396 Chevy Big Block V8

1970-1972 Chevy C20 Suburban

402 Chevy Big Block V8

1973-1986 Chevy C20 Suburban

454 Chevy Big Block V8

1991 Chevy C2500

Chevy Big Block V8 Mark IV 454 L19
Chevy Big Block V8 Gen 5 454 L19

1992-1995 Chevy C2500

454 Chevy Big Block V8

1996-1997 Chevy C2500

Chevy Big Block V8 Gen 5 454 L19
Chevy Big Block V8 Gen 6 ZZ454 454

1992-1995 Chevy C2500 Suburban

454 Chevy Big Block V8

1996-1997 Chevy C2500 Suburban

Chevy Big Block V8 Gen 5 454 L19
Chevy Big Block V8 Gen 6 ZZ454 454

1968-1969 Chevy C30

396 Chevy Big Block V8

1970-1972 Chevy C30

402 Chevy Big Block V8

1973-1986 Chevy C30

454 Chevy Big Block V8

1988-1990 Chevy C3500

454 Chevy Big Block V8

1991 Chevy C3500

Chevy Big Block V8 Mark IV 454 L19
Chevy Big Block V8 Gen 5 454 L19

1992-1995 Chevy C3500

454 Chevy Big Block V8

1996-1997 Chevy C3500

Chevy Big Block V8 Gen 5 454 L19
Chevy Big Block V8 Gen 6 ZZ454 454

1967 Chevy Camaro

Chevy Big Block V8 Mark IV 396 L35
Chevy Big Block V8 Mark IV 396 L78

1968-1969 Chevy Camaro

Chevy Big Block V8 Mark IV 396 L34
Chevy Big Block V8 Mark IV 396 L35
Chevy Big Block V8 Mark IV 396 L78

1970-1972 Chevy Camaro

402 Chevy Big Block V8

1966-1969 Chevy Caprice

396 Chevy Big Block V8

1970-1972 Chevy Caprice

402 Chevy Big Block V8
454 Chevy Big Block V8

1973-1976 Chevy Caprice

454 Chevy Big Block V8

1965-1969 Chevy Chevelle

396 Chevy Big Block V8

1970-1972 Chevy Chevelle

402 Chevy Big Block V8
454 Chevy Big Block V8

1973 Chevy Chevelle

454 Chevy Big Block V8

1968 Chevy Chevy II

396 Chevy Big Block V8

1965 Chevy Corvette

396 Chevy Big Block V8

1970-1974 Chevy Corvette

454 Chevy Big Block V8

1966-1969 Chevy El Camino

396 Chevy Big Block V8

1970-1972 Chevy El Camino

402 Chevy Big Block V8
454 Chevy Big Block V8

1973-1975 Chevy El Camino

454 Chevy Big Block V8

1969 Chevy Estate

396 Chevy Big Block V8

1970 Chevy Estate

402 Chevy Big Block V8
454 Chevy Big Block V8

1996-2000 Chevy Express 2500

Chevy Big Block V8 Gen 5 454 L19
Chevy Big Block V8 Gen 6 ZZ454 454

1996-2000 Chevy Express 3500

Chevy Big Block V8 Gen 5 454 L19
Chevy Big Block V8 Gen 6 ZZ454 454

1988-1990 Chevy G30

454 Chevy Big Block V8

1991 Chevy G30

Chevy Big Block V8 Mark IV 454 L19
Chevy Big Block V8 Gen 5 454 L19

1992-1995 Chevy G30

454 Chevy Big Block V8

1996 Chevy G30

Chevy Big Block V8 Gen 5 454 L19
Chevy Big Block V8 Gen 6 ZZ454 454

1965-1969 Chevy Impala

396 Chevy Big Block V8

1970-1972 Chevy Impala

402 Chevy Big Block V8
454 Chevy Big Block V8

1973-1976 Chevy Impala

454 Chevy Big Block V8

1969 Chevy K10

396 Chevy Big Block V8

1970-1972 Chevy K10

402 Chevy Big Block V8

1973-1974 Chevy K10

454 Chevy Big Block V8

1968-1969 Chevy K10 Suburban

396 Chevy Big Block V8

1970-1972 Chevy K10 Suburban

402 Chevy Big Block V8

1973-1974 Chevy K10 Suburban

454 Chevy Big Block V8

1968-1969 Chevy K20

396 Chevy Big Block V8

1970-1972 Chevy K20

402 Chevy Big Block V8

1973-1974 Chevy K20

454 Chevy Big Block V8

1968-1969 Chevy K20 Suburban

396 Chevy Big Block V8

1970-1972 Chevy K20 Suburban

402 Chevy Big Block V8

1973-1974 Chevy K20 Suburban

454 Chevy Big Block V8

1985 Chevy K20 Suburban

454 Chevy Big Block V8

1991 Chevy K2500

Chevy Big Block V8 Mark IV 454 L19
Chevy Big Block V8 Gen 5 454 L19

1992-1995 Chevy K2500

454 Chevy Big Block V8

1996-1997 Chevy K2500

Chevy Big Block V8 Gen 5 454 L19
Chevy Big Block V8 Gen 6 ZZ454 454

1992-1995 Chevy K2500 Suburban

454 Chevy Big Block V8

1996-1997 Chevy K2500 Suburban

Chevy Big Block V8 Gen 5 454 L19
Chevy Big Block V8 Gen 6 ZZ454 454

1968-1969 Chevy K30

396 Chevy Big Block V8

1970-1972 Chevy K30

402 Chevy Big Block V8

1977-1986 Chevy K30

454 Chevy Big Block V8

1988-1990 Chevy K3500

454 Chevy Big Block V8

1991 Chevy K3500

Chevy Big Block V8 Mark IV 454 L19
Chevy Big Block V8 Gen 5 454 L19

1992-1995 Chevy K3500

454 Chevy Big Block V8

1996-1997 Chevy K3500

Chevy Big Block V8 Gen 5 454 L19
Chevy Big Block V8 Gen 6 ZZ454 454

1969 Chevy Kingswood

396 Chevy Big Block V8

1970-1972 Chevy Kingswood

402 Chevy Big Block V8
454 Chevy Big Block V8

1973-1975 Chevy Laguna

454 Chevy Big Block V8

1965-1967 Chevy Malibu

396 Chevy Big Block V8

1973-1975 Chevy Malibu

454 Chevy Big Block V8

1970-1972 Chevy Monte Carlo

402 Chevy Big Block V8
454 Chevy Big Block V8

1973-1975 Chevy Monte Carlo

454 Chevy Big Block V8

1969 Chevy Nova

396 Chevy Big Block V8

1970 Chevy Nova

402 Chevy Big Block V8

1975-1990 Chevy P30

454 Chevy Big Block V8

1991 Chevy P30

Chevy Big Block V8 Gen 5 454 L19
Chevy Big Block V8 Mark IV 454 LS5

1992-1995 Chevy P30

454 Chevy Big Block V8

1996-1997 Chevy P30

Chevy Big Block V8 Gen 5 454 L19
Chevy Big Block V8 Gen 6 ZZ454 454

1972 Chevy P30 Van

402 Chevy Big Block V8

1973-1974 Chevy P30 Van

454 Chevy Big Block V8

1987-1988 Chevy R20

454 Chevy Big Block V8

1987-1988 Chevy R20 Suburban

454 Chevy Big Block V8

1989 Chevy R2500

454 Chevy Big Block V8

1989-1990 Chevy R2500 Suburban

454 Chevy Big Block V8

1991 Chevy R2500 Suburban

Chevy Big Block V8 Mark IV 454 L19
Chevy Big Block V8 Gen 5 454 L19

1987-1988 Chevy R30

454 Chevy Big Block V8

1989-1990 Chevy R3500

454 Chevy Big Block V8

1991 Chevy R3500

Chevy Big Block V8 Mark IV 454 L19
Chevy Big Block V8 Gen 5 454 L19

1969 Chevy Townsman

396 Chevy Big Block V8

1970-1972 Chevy Townsman

402 Chevy Big Block V8
454 Chevy Big Block V8

1987-1988 Chevy V20 Suburban

454 Chevy Big Block V8

1990 Chevy V2500 Suburban

454 Chevy Big Block V8

1987-1988 Chevy V30

454 Chevy Big Block V8

1989-1990 Chevy V3500

454 Chevy Big Block V8

1991 Chevy V3500

Chevy Big Block V8 Mark IV 454 L19
Chevy Big Block V8 Gen 5 454 L19

1975-1978 GMC C15

454 Chevy Big Block V8

1975-1978 GMC C15 Suburban

454 Chevy Big Block V8

1973-1974 GMC C15/C1500 Pickup

454 Chevy Big Block V8

1973-1974 GMC C15/C1500 Suburban

454 Chevy Big Block V8

1979 GMC C1500

454 Chevy Big Block V8

1979 GMC C1500 Suburban

454 Chevy Big Block V8

1975-1978 GMC C25

454 Chevy Big Block V8

1975-1978 GMC C25 Suburban

454 Chevy Big Block V8

1967-1970 GMC C25/C2500 Pickup

396 Chevy Big Block V8

1971-1972 GMC C25/C2500 Pickup

402 Chevy Big Block V8

1973-1974 GMC C25/C2500 Pickup

454 Chevy Big Block V8

1967-1970 GMC C25/C2500 Suburban

396 Chevy Big Block V8

1971-1972 GMC C25/C2500 Suburban

402 Chevy Big Block V8

1973-1974 GMC C25/C2500 Suburban

454 Chevy Big Block V8

1979-1986 GMC C2500

454 Chevy Big Block V8

1988-1990 GMC C2500

454 Chevy Big Block V8

1991 GMC C2500

Chevy Big Block V8 Mark IV 454 L19
Chevy Big Block V8 Gen 5 454 L19

1992-1995 GMC C2500

454 Chevy Big Block V8

1996-2000 GMC C2500

Chevy Big Block V8 Gen 5 454 L19
Chevy Big Block V8 Gen 6 ZZ454 454

1979-1986 GMC C2500 Suburban

454 Chevy Big Block V8

1992-1995 GMC C2500 Suburban

454 Chevy Big Block V8

1996-1999 GMC C2500 Suburban

Chevy Big Block V8 Gen 5 454 L19
Chevy Big Block V8 Gen 6 ZZ454 454

1975-1978 GMC C35

454 Chevy Big Block V8

1967-1970 GMC C35/C3500 Pickup

396 Chevy Big Block V8

1971-1972 GMC C35/C3500 Pickup

402 Chevy Big Block V8

1979-1986 GMC C3500

454 Chevy Big Block V8

1988-1990 GMC C3500

454 Chevy Big Block V8

1991 GMC C3500

Chevy Big Block V8 Mark IV 454 L19
Chevy Big Block V8 Gen 5 454 L19

1992-1995 GMC C3500

454 Chevy Big Block V8

1996-2000 GMC C3500

Chevy Big Block V8 Gen 5 454 L19
Chevy Big Block V8 Gen 6 ZZ454 454

1967-1970 GMC K25/K2500 Pickup

396 Chevy Big Block V8

1971-1972 GMC K25/K2500 Pickup

402 Chevy Big Block V8

1967-1970 GMC K25/K2500 Suburban

396 Chevy Big Block V8

1971-1972 GMC K25/K2500 Suburban

402 Chevy Big Block V8

1994-1999 GMC K2500 Suburban

Chevy Big Block V8 Gen 5 454 L19
Chevy Big Block V8 Gen 6 ZZ454 454

1977-1978 GMC K35

454 Chevy Big Block V8

1967-1970 GMC K35/K3500 Pickup

396 Chevy Big Block V8

1971-1972 GMC K35/K3500 Pickup

402 Chevy Big Block V8

1979-1986 GMC K3500

454 Chevy Big Block V8

1988-1990 GMC K3500

454 Chevy Big Block V8

1991 GMC K3500

Chevy Big Block V8 Mark IV 454 L19
Chevy Big Block V8 Gen 5 454 L19

1992-1995 GMC K3500

454 Chevy Big Block V8

1996-2000 GMC K3500

Chevy Big Block V8 Gen 5 454 L19
Chevy Big Block V8 Gen 6 ZZ454 454

1987-1989 GMC R2500

454 Chevy Big Block V8

1987-1990 GMC R2500 Suburban

454 Chevy Big Block V8

1991 GMC R2500 Suburban

Chevy Big Block V8 Mark IV 454 L19
Chevy Big Block V8 Gen 5 454 L19

1987-1990 GMC R3500

454 Chevy Big Block V8

1991 GMC R3500

Chevy Big Block V8 Mark IV 454 L19
Chevy Big Block V8 Gen 5 454 L19

1996-2000 GMC Savana 2500

Chevy Big Block V8 Gen 5 454 L19
Chevy Big Block V8 Gen 6 ZZ454 454

1996-2000 GMC Savana 3500

Chevy Big Block V8 Gen 5 454 L19
Chevy Big Block V8 Gen 6 ZZ454 454

1971-1972 GMC Sprint

402 Chevy Big Block V8
454 Chevy Big Block V8

1973-1977 GMC Sprint

454 Chevy Big Block V8

1967 GMC Suburban

396 Chevy Big Block V8
402 Chevy Big Block V8