The Edelbrock Performer RPM 302 Intake Manifold is designed to fit the 289, and 302 V8 Mustangs. This manifold will not fit 255 c.i.d. V8s.
Edelbrock designed their Performer RPM 302 Intake Manifold with a dual-plane high rise manifold for excellent high rpm power while retaining throttle response on 289, or 302 V8 Fords without EGR (exhaust gas recirculation). The Edelbrock Performer RPM Intake Manifold is perfect replacement for 289 and 302 V8 Mustangs with a OEM 4V Carburetor.