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Doug's Headers 1965-76 Chevy Big Block 396/402/427/454 1 3/4" Long Tube Header D313

Doug's Headers 1965-76 Chevy Big Block 396/402/427/454 1 3/4" Long Tube Header D313
Doug's Headers 1965-76 Chevy Big Block 396/402/427/454 1 3/4" Long Tube Header D313Doug's Headers 1965-76 Chevy Big Block 396/402/427/454 1 3/4" Long Tube Header D313
from $1,471.00 st

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Model: 5124705
Select a Vehicle or refer to the Vehicle Fitment Tab below to verify that this part fits your vehicle.
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Long tube headers provide the greatest increases in horsepower and torque across the entire RPM spectrum. The choice of racers worldwide, Doug's long tube headers are designed for the car owner who wants maximum power and the highest quality header on the market. This fitment is tailored for popular aftermarket engine swap kits. Doug's engine swap headers were developed to solve common fitment issues in tight spaces, making your swap process smoother. No more guesswork or modifications needed - just straightforward installations that save you time and frustration.
Features:
  • 3/8" Thick machined flanges to prevent warping
  • Precision formed long transition collectors and long tube design reduces backpressure and increases higher RPM horsepower
  • Heavy duty 16-gauge tubing for long life
  • Tubes are pre-polished to removed scratches before applying metallic ceramic or hi-temp black coating
About Doug's Headers

Doug's Headers are a fixture in the motorsports aftermarket, pioneering quality muscle car performance headers for decades. Unlike the competition, Doug's Headers prides ourselves on superior design detail resulting in a hassle-free installation for any application.

Downloads:

Download Name File Size
D313.pdf319.15KB

Vehicle Fitment:

The Vehicle Fitment Guide is to be used as a general reference. The data has been provided by our suppliers and manufacturers and may contain errors or incorrect data. Always refer to a professional to verify correct fitment for your vehicle.
Make Model Years Engine Fitment Notes
Chevrolet Bel Air 1968 7.0L / 427 / V8
6.5L / 396 / V8		 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 68-69 Bel Air Emission Vehicles in 50 States
Chevrolet Bel Air 1969 7.0L / 427 / V8
6.5L / 396 / V8		 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 68-69 Bel Air Emission Vehicles in 50 States
Chevrolet Bel Air 1970 7.4L / 454 / V8
6.6L / 402 / V8		 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-74 Bel Air Emission Vehicles in 50 States
Not Legal for use on 70-72 Bel Air Emission Vehicles in 50 States
Chevrolet Bel Air 1971 7.4L / 454 / V8
6.6L / 402 / V8		 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-74 Bel Air Emission Vehicles in 50 States
Not Legal for use on 70-72 Bel Air Emission Vehicles in 50 States
Chevrolet Bel Air 1972 7.4L / 454 / V8
6.6L / 402 / V8		 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-74 Bel Air Emission Vehicles in 50 States
Not Legal for use on 70-72 Bel Air Emission Vehicles in 50 States
Chevrolet Bel Air 1973 7.4L / 454 / V8 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-74 Bel Air Emission Vehicles in 50 States
Chevrolet Bel Air 1974 7.4L / 454 / V8 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-74 Bel Air Emission Vehicles in 50 States
Chevrolet Biscayne 1968 7.0L / 427 / V8
6.5L / 396 / V8		 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 68-69 Biscayne Emission Vehicles in 50 States
Not Legal for use on 68-69 Bel Air Emission Vehicles in 50 States
Chevrolet Biscayne 1969 7.0L / 427 / V8
6.5L / 396 / V8		 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 68-69 Biscayne Emission Vehicles in 50 States
Not Legal for use on 68-69 Bel Air Emission Vehicles in 50 States
Chevrolet Biscayne 1970 7.4L / 454 / V8
6.6L / 402 / V8		 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-72 Biscayne Emission Vehicles in 50 States
Chevrolet Biscayne 1971 7.4L / 454 / V8
6.6L / 402 / V8		 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-72 Biscayne Emission Vehicles in 50 States
Chevrolet Biscayne 1972 7.4L / 454 / V8
6.6L / 402 / V8		 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-72 Biscayne Emission Vehicles in 50 States
Chevrolet Brookwood 1969 7.0L / 427 / V8
6.5L / 396 / V8		 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 1969 Brookwood Emission Vehicles in 50 States
Chevrolet Brookwood 1970 7.4L / 454 / V8
6.6L / 402 / V8		 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-72 Brookwood Emission Vehicles in 50 States
Chevrolet Brookwood 1971 7.4L / 454 / V8
6.6L / 402 / V8		 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-72 Brookwood Emission Vehicles in 50 States
Chevrolet Brookwood 1972 7.4L / 454 / V8
6.6L / 402 / V8		 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-72 Brookwood Emission Vehicles in 50 States
Chevrolet Camaro 1967 6.5L / 396 / V8 Will fit OE Suspension & Detroit Speed & Engineering front subframes on 67-69 Camaro with rack steering
Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
with Floor Shifter
Legal for use on 1967 Camaro Emission Vehicles in 50 States
Not Legal for use on 68-69 Camaro Emission Vehicles in 50 States
Chevrolet Camaro 1968 6.5L / 396 / V8 Will fit OE Suspension & Detroit Speed & Engineering front subframes on 67-69 Camaro with rack steering
Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
with Floor Shifter
Legal for use on 1967 Camaro Emission Vehicles in 50 States
Not Legal for use on 68-69 Camaro Emission Vehicles in 50 States
Chevrolet Camaro 1969 7.0L / 427 / V8
6.5L / 396 / V8		 Will fit OE Suspension & Detroit Speed & Engineering front subframes on 67-69 Camaro with rack steering
Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
with Floor Shifter
Not Legal for use on 1969 Camaro Emission Vehicles in 50 States
Legal for use on 1967 Camaro Emission Vehicles in 50 States
Not Legal for use on 68-69 Camaro Emission Vehicles in 50 States
Chevrolet Camaro 1970 6.6L / 402 / V8 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
with Floor Shifter
Not Legal for use on 70-72 Camaro Emission Vehicles in 50 States
Chevrolet Camaro 1971 6.6L / 402 / V8 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
with Floor Shifter
Not Legal for use on 70-72 Camaro Emission Vehicles in 50 States
Chevrolet Camaro 1972 6.6L / 402 / V8 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
with Floor Shifter
Not Legal for use on 70-72 Camaro Emission Vehicles in 50 States
Chevrolet Caprice 1968 7.0L / 427 / V8
6.5L / 396 / V8		 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 68-69 Caprice Emission Vehicles in 50 States
Chevrolet Caprice 1969 7.0L / 427 / V8
6.5L / 396 / V8		 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 68-69 Caprice Emission Vehicles in 50 States
Chevrolet Caprice 1970 7.4L / 454 / V8
6.6L / 402 / V8		 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-76 Caprice Emission Vehicles in 50 States
Not Legal for use on 70-72 Caprice Emission Vehicles in 50 States
Chevrolet Caprice 1971 7.4L / 454 / V8
6.6L / 402 / V8		 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-76 Caprice Emission Vehicles in 50 States
Not Legal for use on 70-72 Caprice Emission Vehicles in 50 States
Chevrolet Caprice 1972 7.4L / 454 / V8
6.6L / 402 / V8		 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-76 Caprice Emission Vehicles in 50 States
Not Legal for use on 70-72 Caprice Emission Vehicles in 50 States
Chevrolet Caprice 1975 7.4L / 454 / V8 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-76 Caprice Emission Vehicles in 50 States
Chevrolet Caprice 1976 7.4L / 454 / V8 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-76 Caprice Emission Vehicles in 50 States
Chevrolet Chevelle 1965 6.5L / 396 / V8 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Legal for use on 65-67 Chevelle Emission Vehicles in 50 States
Chevrolet Chevelle 1967 6.5L / 396 / V8 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Legal for use on 65-67 Chevelle Emission Vehicles in 50 States
Chevrolet Chevelle 1970 7.4L / 454 / V8
6.6L / 402 / V8		 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-72 Chevelle Emission Vehicles in 50 States
Chevrolet Chevelle 1971 7.4L / 454 / V8
6.6L / 402 / V8		 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-72 Chevelle Emission Vehicles in 50 States
Chevrolet Chevelle 1972 7.4L / 454 / V8
6.6L / 402 / V8		 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-72 Chevelle Emission Vehicles in 50 States
Chevrolet Chevy II 1968 6.5L / 396 / V8 Will fit OE Suspension & Detroit Speed & Engineering front subframes on 68 Nova with rack steering
Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Automatic Transmission Only
Full-length
Not Legal for use on 1968 Chevy II Emission Vehicles in 50 States
Chevrolet El Camino 1966 6.5L / 396 / V8 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Legal for use on 66-67 El Camino Emission Vehicles in 50 States
Not Legal for use on 68-70 El Camino Emission Vehicles in 50 States
Chevrolet El Camino 1967 6.5L / 396 / V8 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Legal for use on 66-67 El Camino Emission Vehicles in 50 States
Not Legal for use on 68-70 El Camino Emission Vehicles in 50 States
Chevrolet El Camino 1968 6.5L / 396 / V8 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Legal for use on 66-67 El Camino Emission Vehicles in 50 States
Not Legal for use on 68-70 El Camino Emission Vehicles in 50 States
Chevrolet El Camino 1969 6.5L / 396 / V8 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Legal for use on 66-67 El Camino Emission Vehicles in 50 States
Not Legal for use on 68-70 El Camino Emission Vehicles in 50 States
Chevrolet El Camino 1970 7.4L / 454 / V8
6.6L / 402 / V8
6.5L / 396 / V8		 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-75 El Camino Emission Vehicles in 50 States
Not Legal for use on 70-72 El Camino Emission Vehicles in 50 States
Legal for use on 66-67 El Camino Emission Vehicles in 50 States
Not Legal for use on 68-70 El Camino Emission Vehicles in 50 States
Chevrolet El Camino 1971 7.4L / 454 / V8
6.6L / 402 / V8		 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-75 El Camino Emission Vehicles in 50 States
Not Legal for use on 70-72 El Camino Emission Vehicles in 50 States
Chevrolet El Camino 1972 7.4L / 454 / V8
6.6L / 402 / V8		 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-75 El Camino Emission Vehicles in 50 States
Not Legal for use on 70-72 El Camino Emission Vehicles in 50 States
Chevrolet El Camino 1973 7.4L / 454 / V8 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-75 El Camino Emission Vehicles in 50 States
Chevrolet El Camino 1974 7.4L / 454 / V8 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-75 El Camino Emission Vehicles in 50 States
Chevrolet El Camino 1975 7.4L / 454 / V8 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-75 El Camino Emission Vehicles in 50 States
Chevrolet Impala 1968 7.0L / 427 / V8
6.5L / 396 / V8		 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 68-69 Impala Emission Vehicles in 50 States
Chevrolet Impala 1969 7.0L / 427 / V8
6.5L / 396 / V8		 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 68-69 Impala Emission Vehicles in 50 States
Chevrolet Impala 1970 7.4L / 454 / V8
6.6L / 402 / V8		 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-76 Impala Emission Vehicles in 50 States
Not Legal for use on 70-72 Impala Emission Vehicles in 50 States
Chevrolet Impala 1971 7.4L / 454 / V8
6.6L / 402 / V8		 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-76 Impala Emission Vehicles in 50 States
Not Legal for use on 70-72 Impala Emission Vehicles in 50 States
Chevrolet Impala 1972 7.4L / 454 / V8
6.6L / 402 / V8		 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-76 Impala Emission Vehicles in 50 States
Not Legal for use on 70-72 Impala Emission Vehicles in 50 States
Chevrolet Impala 1973 7.4L / 454 / V8 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-76 Impala Emission Vehicles in 50 States
Chevrolet Impala 1974 7.4L / 454 / V8 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-76 Impala Emission Vehicles in 50 States
Chevrolet Impala 1975 7.4L / 454 / V8 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-76 Impala Emission Vehicles in 50 States
Chevrolet Impala 1976 7.4L / 454 / V8 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-76 Impala Emission Vehicles in 50 States
Chevrolet Kingswood 1969 7.0L / 427 / V8
6.5L / 396 / V8		 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 1969 Kingswood Emission Vehicles in 50 States
Chevrolet Kingswood 1970 7.4L / 454 / V8
6.6L / 402 / V8		 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-72 Kingswood Emission Vehicles in 50 States
Chevrolet Kingswood 1971 7.4L / 454 / V8
6.6L / 402 / V8		 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-72 Kingswood Emission Vehicles in 50 States
Chevrolet Kingswood 1972 7.4L / 454 / V8
6.6L / 402 / V8		 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-72 Kingswood Emission Vehicles in 50 States
Chevrolet Monte Carlo 1970 7.4L / 454 / V8
6.6L / 402 / V8		 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-74 Monte Carlo Emission Vehicles in 50 States
Not Legal for use on 70-72 Monte Carlo Emission Vehicles in 50 States
Chevrolet Monte Carlo 1971 7.4L / 454 / V8
6.6L / 402 / V8		 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-74 Monte Carlo Emission Vehicles in 50 States
Not Legal for use on 70-72 Monte Carlo Emission Vehicles in 50 States
Chevrolet Monte Carlo 1972 7.4L / 454 / V8
6.6L / 402 / V8		 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-74 Monte Carlo Emission Vehicles in 50 States
Not Legal for use on 70-72 Monte Carlo Emission Vehicles in 50 States
Chevrolet Monte Carlo 1973 7.4L / 454 / V8 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-74 Monte Carlo Emission Vehicles in 50 States
Chevrolet Monte Carlo 1974 7.4L / 454 / V8 Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-74 Monte Carlo Emission Vehicles in 50 States
Chevrolet Nova 1969 6.5L / 396 / V8 Will fit OE Suspension & Detroit Speed & Engineering front subframes on 69 Nova with rack steering
Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 1969 Nova Emission Vehicles in 50 States
Chevrolet Nova 1970 7.4L / 454 / V8
6.6L / 402 / V8		 Will fit OE Suspension & Detroit Speed & Engineering front subframes on 70-71 Nova with rack steering
Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-71 Nova Emission Vehicles in 50 States
Will fit OE Suspension & Detroit Speed & Engineering front subframes on 70-72 Nova with rack steering
Not Legal for use on 70-72 Nova Emission Vehicles in 50 States
Chevrolet Nova 1971 7.4L / 454 / V8
6.6L / 402 / V8		 Will fit OE Suspension & Detroit Speed & Engineering front subframes on 70-71 Nova with rack steering
Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-71 Nova Emission Vehicles in 50 States
Will fit OE Suspension & Detroit Speed & Engineering front subframes on 70-72 Nova with rack steering
Not Legal for use on 70-72 Nova Emission Vehicles in 50 States
Chevrolet Nova 1972 6.6L / 402 / V8 Will fit OE Suspension & Detroit Speed & Engineering front subframes on 70-72 Nova with rack steering
Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
Full-length
Not Legal for use on 70-72 Nova Emission Vehicles in 50 States
Pontiac Firebird 1967 6.6L / 400 / V8
5.3L / 326 / V8		 Will fit OE Suspension & Detroit Speed & Engineering front subframes on 67-69Firebird with rack steering
Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
For use with 396-502 Big Block Chevrolet Engine Swap
Full-length
with Floor Shifter
Legal for use on 1967 Firebird Emission Vehicles in 50 States
Not Legal for use on 68-81 Firebird Emission Vehicles in 50 States
Pontiac Firebird 1968 6.6L / 400 / V8
5.7L / 350 / V8		 Will fit OE Suspension & Detroit Speed & Engineering front subframes on 67-69Firebird with rack steering
Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
For use with 396-502 Big Block Chevrolet Engine Swap
Full-length
with Floor Shifter
Legal for use on 1967 Firebird Emission Vehicles in 50 States
Not Legal for use on 68-81 Firebird Emission Vehicles in 50 States
Pontiac Firebird 1969 6.6L / 400 / V8
5.7L / 350 / V8		 Will fit OE Suspension & Detroit Speed & Engineering front subframes on 67-69Firebird with rack steering
Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
For use with 396-502 Big Block Chevrolet Engine Swap
Full-length
with Floor Shifter
Legal for use on 1967 Firebird Emission Vehicles in 50 States
Not Legal for use on 68-81 Firebird Emission Vehicles in 50 States
Pontiac Firebird 1970 5.7L / 350 / V8
6.6L / 400 / V8		 Will fit OE Suspension & Detroit Speed & Engineering front subframes on 67-69Firebird with rack steering
Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
For use with 396-502 Big Block Chevrolet Engine Swap
Full-length
with Floor Shifter
Legal for use on 1967 Firebird Emission Vehicles in 50 States
Not Legal for use on 68-81 Firebird Emission Vehicles in 50 States
Pontiac Firebird 1971 7.5L / 455 / V8
5.7L / 350 / V8
6.6L / 400 / V8		 Will fit OE Suspension & Detroit Speed & Engineering front subframes on 67-69Firebird with rack steering
Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
For use with 396-502 Big Block Chevrolet Engine Swap
Full-length
with Floor Shifter
Legal for use on 1967 Firebird Emission Vehicles in 50 States
Not Legal for use on 68-81 Firebird Emission Vehicles in 50 States
Pontiac Firebird 1972 6.6L / 400 / V8
5.7L / 350 / V8
7.5L / 455 / V8		 Will fit OE Suspension & Detroit Speed & Engineering front subframes on 67-69Firebird with rack steering
Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
For use with 396-502 Big Block Chevrolet Engine Swap
Full-length
with Floor Shifter
Legal for use on 1967 Firebird Emission Vehicles in 50 States
Not Legal for use on 68-81 Firebird Emission Vehicles in 50 States
Pontiac Firebird 1973 6.6L / 400 / V8
5.7L / 350 / V8
7.5L / 455 / V8		 Will fit OE Suspension & Detroit Speed & Engineering front subframes on 67-69Firebird with rack steering
Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
For use with 396-502 Big Block Chevrolet Engine Swap
Full-length
with Floor Shifter
Legal for use on 1967 Firebird Emission Vehicles in 50 States
Not Legal for use on 68-81 Firebird Emission Vehicles in 50 States
Pontiac Firebird 1974 6.6L / 400 / V8
5.7L / 350 / V8
7.5L / 455 / V8		 Will fit OE Suspension & Detroit Speed & Engineering front subframes on 67-69Firebird with rack steering
Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
For use with 396-502 Big Block Chevrolet Engine Swap
Full-length
with Floor Shifter
Legal for use on 1967 Firebird Emission Vehicles in 50 States
Not Legal for use on 68-81 Firebird Emission Vehicles in 50 States
Pontiac Firebird 1975 7.5L / 455 / V8
5.7L / 350 / V8
6.6L / 400 / V8		 Will fit OE Suspension & Detroit Speed & Engineering front subframes on 67-69Firebird with rack steering
Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
For use with 396-502 Big Block Chevrolet Engine Swap
Full-length
with Floor Shifter
Legal for use on 1967 Firebird Emission Vehicles in 50 States
Not Legal for use on 68-81 Firebird Emission Vehicles in 50 States
Pontiac Firebird 1976 7.5L / 455 / V8
5.7L / 350 / V8
6.6L / 400 / V8		 Will fit OE Suspension & Detroit Speed & Engineering front subframes on 67-69Firebird with rack steering
Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
For use with 396-502 Big Block Chevrolet Engine Swap
Full-length
with Floor Shifter
Legal for use on 1967 Firebird Emission Vehicles in 50 States
Not Legal for use on 68-81 Firebird Emission Vehicles in 50 States
Pontiac Firebird 1977 5.0L / 305 / V8
5.7L / 350 / V8
6.6L / 400 / V8
4.9L / 301 / V8
6.6L / 403 / V8		 Will fit OE Suspension & Detroit Speed & Engineering front subframes on 67-69Firebird with rack steering
Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
For use with 396-502 Big Block Chevrolet Engine Swap
Full-length
with Floor Shifter
Legal for use on 1967 Firebird Emission Vehicles in 50 States
Not Legal for use on 68-81 Firebird Emission Vehicles in 50 States
Pontiac Firebird 1978 6.6L / 400 / V8
6.6L / 403 / V8
5.0L / 305 / V8
5.7L / 350 / V8		 Will fit OE Suspension & Detroit Speed & Engineering front subframes on 67-69Firebird with rack steering
Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
For use with 396-502 Big Block Chevrolet Engine Swap
Full-length
with Floor Shifter
Legal for use on 1967 Firebird Emission Vehicles in 50 States
Not Legal for use on 68-81 Firebird Emission Vehicles in 50 States
Pontiac Firebird 1979 6.6L / 400 / V8
6.6L / 403 / V8
5.0L / 305 / V8
5.7L / 350 / V8
4.9L / 301 / V8		 Will fit OE Suspension & Detroit Speed & Engineering front subframes on 67-69Firebird with rack steering
Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
For use with 396-502 Big Block Chevrolet Engine Swap
Full-length
with Floor Shifter
Legal for use on 1967 Firebird Emission Vehicles in 50 States
Not Legal for use on 68-81 Firebird Emission Vehicles in 50 States
Pontiac Firebird 1980 4.3L / 265 / V8
5.0L / 305 / V8
4.9L / 301 / V8		 Will fit OE Suspension & Detroit Speed & Engineering front subframes on 67-69Firebird with rack steering
Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
For use with 396-502 Big Block Chevrolet Engine Swap
Full-length
with Floor Shifter
Legal for use on 1967 Firebird Emission Vehicles in 50 States
Not Legal for use on 68-81 Firebird Emission Vehicles in 50 States
Pontiac Firebird 1981 5.0L / 305 / V8
4.4L / 267 / V8
4.3L / 265 / V8
4.9L / 301 / V8		 Will fit OE Suspension & Detroit Speed & Engineering front subframes on 67-69Firebird with rack steering
Big block frame stands and motor mounts required for proper fit.
Does not fit with power glide transmission.
For use with 396-502 Big Block Chevrolet Engine Swap
Full-length
with Floor Shifter
Legal for use on 1967 Firebird Emission Vehicles in 50 States
Not Legal for use on 68-81 Firebird Emission Vehicles in 50 States

Specifications:

Collector Attachment 3-Bolt Flange
Collector Diameter 3.0 IN
Collector Port Diameter 3.0 IN
Cylinder Head Port Shape SAP
Design Full-length
Flange Thickness 0.375 IN
Gasket Or Seal Included Yes
Gaskets Included Yes
Grade Type Performance
Header Style Full-length
Mounting Hardware Included Yes
Oxygen Sensor Port No
Part Type Exhaust Header
Port Shape Round
Primary Tube Outside Diameter 1.75 IN
Proposition 65 www.P65Warnings.ca.gov
Tube Wall Thickness 16 GU
Warranty Time 24 Months

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Doug's Headers 1965-76 Chevy Big Block 396/402/427/454 1 3/4" Long Tube Header D313:
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