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 |
| D3336.pdf | 209.39KB |
| Make | Model | Years | Fitment Notes |
| Buick | GS | 1970 - 1972 | GM LS Engine Swap Includes O2 sensor extension harness. Requires Doug's LS1 adapter plate kit P/N SK100 or equivalent. Will not fit manual transmission cars with factory Z bar clutch linkage. Full-length |
| Buick | Skylark | 1964 - 1972 | GM LS Engine Swap Includes O2 sensor extension harness. Requires Doug's LS1 adapter plate kit P/N SK100 or equivalent. Will not fit manual transmission cars with factory Z bar clutch linkage. Full-length Legal for use on 67-67 Skylark Emission Vehicles in 50 States Not Legal for use on 68-72 Skylark Emission Vehicles in 50 States |
| Buick | Sportwagon | 1964 - 1972 | GM LS Engine Swap Includes O2 sensor extension harness. Requires Doug's LS1 adapter plate kit P/N SK100 or equivalent. Will not fit manual transmission cars with factory Z bar clutch linkage. Full-length Legal for use on 64-67 Sportwagon Emission Vehicles in 50 States Not Legal for use on 68-72 Sportwagon Emission Vehicles in 50 States |
| Chevrolet | Chevelle | 1964 - 1972 | GM LS Engine Swap Includes O2 sensor extension harness. Requires Doug's LS1 adapter plate kit P/N SK100 or equivalent. Will not fit manual transmission cars with factory Z bar clutch linkage. Full-length Legal for use on 64-67 Chevelle Emission Vehicles in 50 States Not Legal for use on 68-72 Chevelle Emission Vehicles in 50 States |
| Chevrolet | El Camino | 1964 - 1972 | GM LS Engine Swap Includes O2 sensor extension harness. Requires Doug's LS1 adapter plate kit P/N SK100 or equivalent. Will not fit manual transmission cars with factory Z bar clutch linkage. Full-length Legal for use on 64-67 El Camino Emission Vehicles in 50 States Not Legal for use on 68-72 El Camino Emission Vehicles in 50 States |
| GMC | Sprint | 1971 - 1972 | GM LS Engine Swap Includes O2 sensor extension harness. Requires Doug's LS1 adapter plate kit P/N SK100 or equivalent. Will not fit manual transmission cars with factory Z bar clutch linkage. Full-length |
| Pontiac | GTO | 1964 - 1972 | GM LS Engine Swap Includes O2 sensor extension harness. Requires Doug's LS1 adapter plate kit P/N SK100 or equivalent. Will not fit manual transmission cars with factory Z bar clutch linkage. Full-length Legal for use on 67-67 GTO Emission Vehicles in 50 States Not Legal for use on 68-72 GTO Emission Vehicles in 50 States |
| Pontiac | LeMans | 1964 - 1972 | GM LS Engine Swap Includes O2 sensor extension harness. Requires Doug's LS1 adapter plate kit P/N SK100 or equivalent. Will not fit manual transmission cars with factory Z bar clutch linkage. Full-length Legal for use on 67-67 LeMans Emission Vehicles in 50 States Not Legal for use on 68-72 LeMans Emission Vehicles in 50 States |
| Pontiac | Tempest | 1964 - 1970 | GM LS Engine Swap Includes O2 sensor extension harness. Requires Doug's LS1 adapter plate kit P/N SK100 or equivalent. Will not fit manual transmission cars with factory Z bar clutch linkage. Full-length Legal for use on 67-67 Tempest Emission Vehicles in 50 States Not Legal for use on 68-70 Tempest 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 | 1.75 IN |
| Proposition 65 | www.P65Warnings.ca.gov |
| Tube Wall Thickness | 16 GU |
| Warranty Time | 24 Months |
