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Doug's Headers D371Y-B Tri-Y Header, 1-5/8 In, 67-72 Chevy Truck, Blk

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#447D371YB

Doug's Headers D371Y-B Tri-Y Header, 1-5/8 In, 67-72 Chevy Truck, Blk

Name: Doug's Headers D371Y-B Tri-Y Header, 1-5/8 In, 67-72 Chevy Truck, Blk
Brand: Doug's Headers
SKU: 447D371YB
Price: 698.72 USD
Availability: InStock

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1 Question

Finish:

Painted

Ceramic Coated

$698.72

/set

Factory Shipped

$853.99

Save $155.27

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Product Summary

Tri-Y Header Tube Type, Oval Exhaust Port Shape, Steel

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Key Specs

MFG. Part #	D371Y-B
Header Tube Type	Tri-Y
Exhaust Port Shape	Oval
Flange Style	Standard
Primary Tube Diameter	1-5/8"

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Need To Know

Need help?

855.313.9176

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Doug's Headers D371Y-B Details

Doug's 2/4 WD TRUCK HEADERS Tri-Y Hi-Temp Black Coated Header development and design is complex and requires a substantial amount of time and resources to do the job right! Many manufacturers are unwilling to make the commitment and instead offer compromised headers at lower prices. Doug's will not compromise performance, quality or fit to compete with inferior designs at cheap prices. Every Doug's header is tuned with the proper tube size and length to efficiently remove all the exhaust from each cylinder, reducing pumping losses resulting in a dramatic increases in horsepower and torque. Doug's headers are carefully developed on the vehicles they are intended to fit and are re-checked numerous times during the design and manufacturing process.

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 isfinished with a Hi-Temp Black Coating

Doug's Headers D371Y-B 1 5/8" Tri-Y Header Chevrolet Truck Small Block Chevrolet 67-72 Hi-Temp Black Coating

Doug's Headers D371Y-B 1 5/8" Tri-Y Header Chevrolet Truck Small Block Chevrolet 67-72 Hi-Temp Black Coating

Rebates

Pertronix 10% Off Dougs, JBA & Patriot Parts Sale

Pertronix10%OffDougs/JBA/PatriotPartsSale

Pertronix 10% Off All Parts under the Dougs, JBA and Patriot Brands, running from August 1, 2026, through August 31, 2026. For a limited time, customers can save 10% off on All Parts under the Dougs, JBA and Patriot Brands, making it the perfect opportunity to upgrade your vehicle with high-quality components. No rainchecks. Sale prices apply to purchases made during the sale period only.

Guides & Documents

Headers Installation Instructions (447D371YB)

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 D371Y-B Specifications

KEY SPECS
MFG. Part #	D371Y-B
Brand	Doug's Headers
Header Tube Type	Tri-Y
Exhaust Port Shape	Oval
Flange Style	Standard
Primary Tube Diameter	1-5/8"
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	694342543914

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Questions & Answers

1 Question • 1 Answer

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Will these fit a manual transmission

by Quentin

• 2 years ago

1 answer

View Answer

1 of 1 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

1957-1967 Chevy Bel Air

2-Piece Rear Main Chevy 283

1968 Chevy Bel Air

Gen 1 L14 Small Block Chevy

1958-1967 Chevy Biscayne

2-Piece Rear Main Chevy 283

1968 Chevy Biscayne

Gen 1 L14 Small Block Chevy

1969-1973 Chevy Blazer

Gen 1 L14 Small Block Chevy

1958-1961 Chevy Brookwood

2-Piece Rear Main Chevy 283

1969-1972 Chevy Brookwood

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

1983 Chevy C10

2-Piece Rear Main Chevy 350

1985 Chevy C10

2-Piece Rear Main Chevy 350

1960-1967 Chevy C10 Suburban

2-Piece Rear Main Chevy 283

1968-1973 Chevy C10 Suburban

Gen 1 L14 Small Block Chevy

1983 Chevy C10 Suburban

2-Piece Rear Main Chevy 350

1985 Chevy C10 Suburban

2-Piece Rear Main Chevy 350

1960-1967 Chevy C20

2-Piece Rear Main Chevy 283

1968-1973 Chevy C20

Gen 1 L14 Small Block Chevy

1960-1967 Chevy C20 Suburban

2-Piece Rear Main Chevy 283

1968-1973 Chevy C20 Suburban

Gen 1 L14 Small Block Chevy

1960-1967 Chevy C30

2-Piece Rear Main Chevy 283

1968-1973 Chevy C30

Gen 1 L14 Small Block Chevy

1969-1973 Chevy Camaro

Gen 1 L14 Small Block Chevy

1966-1967 Chevy Caprice

2-Piece Rear Main Chevy 283

1968-1973 Chevy Caprice

Gen 1 L14 Small Block Chevy

1983 Chevy Caprice

2-Piece Rear Main Chevy 350

1985 Chevy Caprice

2-Piece Rear Main Chevy 350

1964-1967 Chevy Chevelle

2-Piece Rear Main Chevy 283

1968-1973 Chevy Chevelle

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

1985 Chevy Corvette

2-Piece Rear Main Chevy 350

1957-1958 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

1968-1973 Chevy El Camino

Gen 1 L14 Small Block Chevy

1978-1979 Chevy El Camino

2-Piece Rear Main Chevy 350

1983 Chevy El Camino

2-Piece Rear Main Chevy 350

1969-1970 Chevy Estate

Gen 1 L14 Small Block Chevy

1968-1969 Chevy G10 Van

Gen 1 L14 Small Block Chevy

1970 Chevy G10 Van

2-Piece Rear Main Chevy 350
Gen 1 L14 Small Block Chevy

1971-1973 Chevy G10 Van

Gen 1 L14 Small Block Chevy

1967 Chevy G20 Van

2-Piece Rear Main Chevy 283

1968-1973 Chevy G20 Van

Gen 1 L14 Small Block Chevy

1970 Chevy G30 Van

2-Piece Rear Main Chevy 350

1958-1967 Chevy Impala

2-Piece Rear Main Chevy 283

1968-1973 Chevy Impala

Gen 1 L14 Small Block Chevy

1983 Chevy Impala

2-Piece Rear Main Chevy 350

1985 Chevy Impala

2-Piece Rear Main Chevy 350

1960-1967 Chevy K10

2-Piece Rear Main Chevy 283

1968-1973 Chevy K10

Gen 1 L14 Small Block Chevy

1960-1967 Chevy K10 Suburban

2-Piece Rear Main Chevy 283

1968-1973 Chevy K10 Suburban

Gen 1 L14 Small Block Chevy

1960-1967 Chevy K20

2-Piece Rear Main Chevy 283

1968-1973 Chevy K20

Gen 1 L14 Small Block Chevy

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

1968-1973 Chevy K30

Gen 1 L14 Small Block Chevy

1970-1974 Chevy K5 Blazer

2-Piece Rear Main Chevy 350

1983 Chevy K5 Blazer

2-Piece Rear Main Chevy 350

1985 Chevy K5 Blazer

2-Piece Rear Main Chevy 350

1959-1961 Chevy Kingswood

2-Piece Rear Main Chevy 283

1969-1972 Chevy Kingswood

Gen 1 L14 Small Block Chevy

1973 Chevy Laguna

Gen 1 L14 Small Block Chevy

1976 Chevy Laguna

2-Piece Rear Main Chevy 350

1964-1967 Chevy Malibu

2-Piece Rear Main Chevy 283

1973 Chevy Malibu

Gen 1 L14 Small Block Chevy

1970-1971 Chevy Monte Carlo

2-Piece Rear Main Chevy 350

1973-1975 Chevy Monte Carlo

2-Piece Rear Main Chevy 350

1982-1983 Chevy Monte Carlo

2-Piece Rear Main Chevy 350

1957-1961 Chevy Nomad

2-Piece Rear Main Chevy 283

1969-1973 Chevy Nova

Gen 1 L14 Small Block Chevy

1975 Chevy Nova

2-Piece Rear Main Chevy 350

1957 Chevy One-Fifty Series

2-Piece Rear Main Chevy 283

1980-1983 Chevy P30

2-Piece Rear Main Chevy 350

1985 Chevy P30

2-Piece Rear Main Chevy 350

1961-1962 Chevy P30 Series

2-Piece Rear Main Chevy 283

1968-1969 Chevy P30 Van

Gen 1 L14 Small Block Chevy

1970 Chevy P30 Van

2-Piece Rear Main Chevy 350

1973 Chevy P30 Van

Gen 1 L14 Small Block Chevy

1959-1961 Chevy Parkwood

2-Piece Rear Main Chevy 283

1957-1958 Chevy Sedan Delivery

2-Piece Rear Main Chevy 283

1960-1967 Chevy Suburban

2-Piece Rear Main Chevy 283

1969-1972 Chevy Townsman

Gen 1 L14 Small Block Chevy

1957-1958 Chevy Truck

2-Piece Rear Main Chevy 283

1960 Chevy Truck

2-Piece Rear Main Chevy 283

1957 Chevy Two-Ten Series

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 C15/C1500 Suburban

2-Piece Rear Main Chevy 350

1980-1984 GMC C1500

2-Piece Rear Main Chevy 350

1980-1986 GMC C1500 Suburban

2-Piece Rear Main Chevy 350

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

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

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

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

1974-1977 GMC Jimmy

2-Piece Rear Main Chevy 350

1983-1984 GMC Jimmy

2-Piece Rear Main Chevy 350

1979-1984 GMC K1500

2-Piece Rear Main Chevy 350

1967 GMC K25/K2500 Pickup

2-Piece Rear Main Chevy 283

1968-1972 GMC K25/K2500 Pickup

Gen 1 L14 Small Block Chevy

1967 GMC K25/K2500 Suburban

2-Piece Rear Main Chevy 283

1968-1972 GMC K25/K2500 Suburban

Gen 1 L14 Small Block Chevy

1979-1984 GMC K2500

2-Piece Rear Main Chevy 350

1967 GMC K35/K3500 Pickup

2-Piece Rear Main Chevy 283

1968-1972 GMC K35/K3500 Pickup

Gen 1 L14 Small Block Chevy

1966 GMC P1000

2-Piece Rear Main Chevy 283

1955-1966 GMC Suburban

2-Piece Rear Main Chevy 283

1967 GMC Suburban

Gen 1 L14 Small Block Chevy

1956-1960 GMC Truck

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