Fits 1963-1979 Pontiac 326-455 V8. Oval/D-ports, 1.55 Inch x 1.94 Inch 1991 GMC K2500 Pickup 6 Lug - 4 x 4 The Edelbrock #60775 Performer RPM

The Edelbrock #60775 Performer RPM head is perfect for street performance

(suits 3" O

and backlit illumination for efficiently monitoring engine oil temperature

Will fit Detroit Speed & Engineering front sub frames with rack and pinion steering

Fits 1963-1979 Pontiac 326-455 V8. Oval/D-ports, 1.55 Inch x 1.94 Inch 1991 GMC K2500 Pickup 6 Lug - 4 x 4 The Edelbrock #60775 Performer RPMManufactured from high temperature steel core graphite faced exhaust material. Expanded steel core provides stability and maximum torque retention to eliminate gasket failure. Graphite facing provides excellent heat resistance and thermal conductivity to transfer heat away from the cylinder head. Conforms to and seals minor surface irregularities. High recovery material allows header or manifold flange to stay sealed if flange loses clamp load. Can be