Edelbrock - Small-Bore Smal Block Chevy Performer RPM Cylinder Heads

Edelbrock - Small-Bore Smal Block Chevy Performer RPM Cylinder Heads

from 642.50

Manufactured from A356 aluminum, these Performer RPM cylinder heads are designed and engineered for use with 265, 283, 305, and 307 cubic-inch small-block Chevy engines, 1955-86, 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 1959-86 style valve cover pattern. Retaining the stock straight spark plug angle and exhaust flange bolt patter allows for use with factory-style exhaust systems. Heads feature thick 9/16” deck, ductile iron valve seats, one piece stainless steel valves, high flowing ports, and premium 3/8” rocker studs. Engineering specifications are 1.50” exhaust valves, 1.91” intakes valves, 60cc combustion chamber volume, and 170cc runner volume. Available bare or assembled and with valve springs for either flat tappet or hydraulic roller camshafts. Sold each. Made in USA.

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