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 |
| D568.pdf | 242.23KB |
| Make | Model | Years | Engine | Fitment Notes |
| Pontiac | Firebird | 1967 | 5.3L / 326 / V8 6.6L / 400 / V8 |
Requires removal or modification of locking steering columns if equipped. Fits Edelbrock Performer RPM, RAM-Air, Super Duty and H.O. Round Port Heads only Application with scatter shield or factory bell housings with dual starter pockets must use WIX oil filter PN 51522 or equivalent. Header will fit with Milodon oil pans 30355, 31660 & 31665. Full-length with Floor Shifter |
| Pontiac | Firebird | 1968 | 5.7L / 350 / V8 6.6L / 400 / V8 |
Requires removal or modification of locking steering columns if equipped. Fits Edelbrock Performer RPM, RAM-Air, Super Duty and H.O. Round Port Heads only Application with scatter shield or factory bell housings with dual starter pockets must use WIX oil filter PN 51522 or equivalent. Header will fit with Milodon oil pans 30355, 31660 & 31665. Full-length with Floor Shifter |
| Pontiac | Firebird | 1969 | 5.7L / 350 / V8 6.6L / 400 / V8 |
Requires removal or modification of locking steering columns if equipped. Fits Edelbrock Performer RPM, RAM-Air, Super Duty and H.O. Round Port Heads only Application with scatter shield or factory bell housings with dual starter pockets must use WIX oil filter PN 51522 or equivalent. Header will fit with Milodon oil pans 30355, 31660 & 31665. Full-length with Floor Shifter |
| Collector Attachment | 3-Bolt Flange |
| Collector Diameter | 3.5 IN |
| Collector Port Diameter | 3.5 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 | No |
| 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 |
