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.
| Download Name | File Size |
| D3355_rev3.pdf | 1.5MB |
| Make | Model | Years | Engine | Fitment Notes |
| Buick | Apollo | 1973 | 5.7L / 350 / V8 | For use with Chevrolet LS Engine Swap. Use with Doug's LS Engine and Transmission Mount kits. Full-length Not Legal for use on 74-74 Apollo Emission Vehicles in 50 States |
| Buick | Apollo | 1974 | 5.7L / 350 / V8 | For use with Chevrolet LS Engine Swap. Use with Doug's LS Engine and Transmission Mount kits. Full-length Not Legal for use on 74-74 Apollo Emission Vehicles in 50 States |
| Chevrolet | Camaro | 1967 | 4.9L / 302 / V8 5.7L / 350 / V8 6.5L / 396 / V8 5.3L / 327 / V8 |
For use with Chevrolet LS Engine Swap. Use with Doug's LS Engine and Transmission Mount kits. Full-length 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 5.7L / 350 / V8 4.9L / 302 / V8 5.4L / 327 / V8 5.3L / 327 / V8 |
For use with Chevrolet LS Engine Swap. Use with Doug's LS Engine and Transmission Mount kits. Full-length 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 | 6.5L / 396 / V8 4.9L / 302 / V8 5.0L / 307 / V8 5.4L / 327 / V8 7.0L / 427 / V8 5.7L / 350 / V8 5.3L / 327 / V8 |
For use with Chevrolet LS Engine Swap. Use with Doug's LS Engine and Transmission Mount kits. Full-length 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 | Chevy II | 1968 | 5.4L / 327 / V8 5.0L / 307 / V8 6.5L / 396 / V8 5.7L / 350 / V8 5.3L / 327 / V8 |
For use with Chevrolet LS Engine Swap. Use with Doug's LS Engine and Transmission Mount kits. Full-length Not Legal for use on 1968 Chevy II Emission Vehicles in 50 States |
| Chevrolet | Nova | 1969 | 5.0L / 307 / V8 6.5L / 396 / V8 5.7L / 350 / V8 |
For use with Chevrolet LS Engine Swap. Use with Doug's LS Engine and Transmission Mount kits. Full-length Not Legal for use on 69-74 Nova Emission Vehicles in 50 States |
| Chevrolet | Nova | 1970 | 5.0L / 307 / V8 7.4L / 454 / V8 5.7L / 350 / V8 6.6L / 402 / V8 6.5L / 396 / V8 |
For use with Chevrolet LS Engine Swap. Use with Doug's LS Engine and Transmission Mount kits. Full-length Not Legal for use on 69-74 Nova Emission Vehicles in 50 States |
| Chevrolet | Nova | 1971 | 5.0L / 307 / V8 7.4L / 454 / V8 5.7L / 350 / V8 6.6L / 402 / V8 |
For use with Chevrolet LS Engine Swap. Use with Doug's LS Engine and Transmission Mount kits. Full-length Not Legal for use on 69-74 Nova Emission Vehicles in 50 States |
| Chevrolet | Nova | 1972 | 5.0L / 307 / V8 6.6L / 402 / V8 5.7L / 350 / V8 |
For use with Chevrolet LS Engine Swap. Use with Doug's LS Engine and Transmission Mount kits. Full-length Not Legal for use on 69-74 Nova Emission Vehicles in 50 States |
| Chevrolet | Nova | 1973 | 5.0L / 307 / V8 5.7L / 350 / V8 |
For use with Chevrolet LS Engine Swap. Use with Doug's LS Engine and Transmission Mount kits. Full-length Not Legal for use on 69-74 Nova Emission Vehicles in 50 States |
| Chevrolet | Nova | 1974 | 5.7L / 350 / V8 | For use with Chevrolet LS Engine Swap. Use with Doug's LS Engine and Transmission Mount kits. Full-length Not Legal for use on 69-74 Nova Emission Vehicles in 50 States |
| Oldsmobile | Omega | 1973 | 5.7L / 350 / V8 | Use with Doug's LS Engine and Transmission Mount kits. For use with Chevrolet LS Engine Swap. Full-length Not Legal for use on 73-74 Omega Emission Vehicles in 50 States |
| Oldsmobile | Omega | 1974 | 5.7L / 350 / V8 | Use with Doug's LS Engine and Transmission Mount kits. For use with Chevrolet LS Engine Swap. Full-length Not Legal for use on 73-74 Omega Emission Vehicles in 50 States |
| Pontiac | Firebird | 1967 | 6.6L / 400 / V8 5.3L / 326 / V8 |
For use with Chevrolet LS Engine Swap. Use with Doug's LS Engine and Transmission Mount kits. Full-length Legal for use on 1967 Firebird Emission Vehicles in 50 States Not Legal for use on 68-69 Firebird Emission Vehicles in 50 States |
| Pontiac | Firebird | 1968 | 6.6L / 400 / V8 5.7L / 350 / V8 |
For use with Chevrolet LS Engine Swap. Use with Doug's LS Engine and Transmission Mount kits. Full-length Legal for use on 1967 Firebird Emission Vehicles in 50 States Not Legal for use on 68-69 Firebird Emission Vehicles in 50 States |
| Pontiac | Firebird | 1969 | 6.6L / 400 / V8 5.7L / 350 / V8 |
For use with Chevrolet LS Engine Swap. Use with Doug's LS Engine and Transmission Mount kits. Full-length Legal for use on 1967 Firebird Emission Vehicles in 50 States Not Legal for use on 68-69 Firebird Emission Vehicles in 50 States |
| Pontiac | Ventura | 1973 | 5.0L / 307 / V8 5.7L / 350 / V8 |
Use with Doug's LS Engine and Transmission Mount kits. For use with Chevrolet LS Engine Swap. Full-length Not Legal for use on 73-74 Omega Emission Vehicles in 50 States |
| Pontiac | Ventura | 1974 | 5.7L / 350 / V8 | Use with Doug's LS Engine and Transmission Mount kits. For use with Chevrolet LS Engine Swap. Full-length Not Legal for use on 73-74 Omega Emission Vehicles in 50 States |
| Collector Attachment | V-Band |
| Collector Diameter | 3.0 IN |
| Collector Port Diameter | 3.0 IN |
| Cylinder Head Port Shape | Round |
| 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 | Yes |
| Part Type | Exhaust Header |
| Port Shape | Round |
| Primary Tube Outside Diameter | 1.875 IN |
| Proposition 65 | www.P65Warnings.ca.gov |
| Tube Wall Thickness | 16 GU |
| Warranty Time | 24 Months |
