| Combustion Chamber Volume | 87cc |
| Fitment | Universal Fit |
| Cylinder Head Type | Pontiac D-Port |
| Deck Thickness | 5/8in |
| Emission | 50 State Legal |
| Engine Make/Size | Pontiac 389 |
| Engine Make/Size | Pontiac 400 |
| Engine Make/Size | Pontiac 421 |
| Engine Make/Size | Pontiac 428 |
| Engine Make/Size | Pontiac 455 |
| Exhaust Port Locaiton | D-Port (Stock Location) |
| Exhaust Valve Diameter | 1.66in |
| Exhaust Volume | 145cc |
| Finish | Cast Aluminum |
| Guideplate | Hardened Steel |
| Intake Valve Diameter | 2.11in |
| Intake Volume | 204cc |
| Preparation | Requires Professional Preparation (Bare) |
| Pushrod Diameter | 5/16in |
| Rocker Stud | 7/16in |
| Spark Plug Fitment | 14mm x 3/4 reach, gasket seat |
| Type | Bare |
| Usage | Street/Performance |
| Valve Angle | 14deg |
| Valve Guides | Manganese Bronze |
| Valve Spring Diameter | 1.46in - 120lbs. @ 1.800in Inst. Height |
| Valve Spring Max Lift | .550in - 1.150in Coil Bind |
| Valve Stem Diameter | 11/32in |