For those car enthusiasts with a small-block Chevy swap in their drift car / race car / high performance machine, Edelbrock has added Performer RPM Cylinder Head designed specifically for small-bore engines. They have been engineered for use with 265, 283, 305 and 307 c.i.d. small-block Chevy engines produced from 1954-2003 with bore sizes less than 4.000 inches. 

To accommodate the smaller bores, valve spacing on these heads have been reduced to 1.817 inches while maintaining the early-style Gen 1 (1959-86) valve cover bolt pattern so that you can use your favorite small-block Chevy valve covers. These new Performer RPM heads also retain the stock straight spark plug angle and exhaust flange bolt pattern for ease of use with factory-style exhaust systems.

Edelbrock Performer RPM Small-Bore Cylinder Heads are legal for use on pre-pollution-controlled vehicles only. Available bare (#61009), with springs for flat-tappet (#61019) or with springs for hydraulic roller camshaft (#61015); these heads can also be used with larger-bore engines if desired.

These calendar heads feature a thick 9/16-inch deck, extra-thick port walls, high-flowing ports, ductile iron seats, one-piece stainless-steel valves, high-quality rocker studs, compact combustion chambers, and highly efficient ports that offer improved performance and great throttle response throughout the rpm range.

Other features include threaded inserts for rocker studs and exhaust bolts for superior strength and durability, as well as manganese-bronze valve guides. These cylinder heads are designed in-house, cast from A356 aluminum, heat treated to T-6 specs, and machined in Edelbrocks Southern California USA manufacturing facilities for unsurpassed quality and performance.

For more information, see Edelbrock.