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 |
| D365.pdf | 571.43KB |
| D365-B.pdf | 571.43KB |
| Make | Model | Years | Engine | Fitment Notes |
| Chevrolet | Chevy II | 1963 | 4.6L / 283 / V8 | Fenderwell exit Fits most angle plug heads Double flange design (inner and outer) Fenderwell |
| Chevrolet | Chevy II | 1964 | 4.6L / 283 / V8 | Fenderwell exit Fits most angle plug heads Double flange design (inner and outer) Fenderwell |
| Chevrolet | Chevy II | 1965 | 5.4L / 327 / V8 5.3L / 327 / V8 4.6L / 283 / V8 |
Fenderwell exit Fits most angle plug heads Double flange design (inner and outer) Fenderwell |
| Chevrolet | Chevy II | 1966 | 5.4L / 327 / V8 5.3L / 327 / V8 4.6L / 283 / V8 |
Fenderwell exit Fits most angle plug heads Double flange design (inner and outer) Fenderwell |
| Chevrolet | Chevy II | 1967 | 5.3L / 327 / V8 4.6L / 283 / V8 |
Fenderwell exit Fits most angle plug heads Double flange design (inner and outer) Fenderwell |
| Collector Attachment | Slip fit |
| Collector Diameter | 3.5 IN |
| Collector Port Diameter | 3.5 IN |
| Cylinder Head Port Shape | SAP |
| Design | Fenderwell |
| Flange Thickness | 0.375 IN |
| Gasket Or Seal Included | Yes |
| Gaskets Included | Yes |
| Grade Type | Performance |
| Header Style | Fenderwell |
| Mounting Hardware Included | Yes |
| Oxygen Sensor Port | No |
| Part Type | Exhaust Header |
| Port Shape | SAP |
| Primary Tube Outside Diameter | 2.0 IN |
| Proposition 65 | www.P65Warnings.ca.gov |
| Tube Wall Thickness | 16 GU |
| Warranty Time | 24 Months |
