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The Edelbrock Performer RPM bare rectangle-port cylinder head is a Big-Block Chevy option built for NHRA Stock/Super Stock applications, delivering strong throttle response and power from about 1,500–6,500 rpm. Cast and heat-treated at Edelbrock’s foundry and machined in the USA, it uses efficient porting, advanced combustion shapes, threaded inserts for rocker studs and exhaust bolts, and manganese-bronze guides with ductile-iron seats.
Edelbrock Cylinder Head Perf RPM BBC Rect Port NHRA Legal Bare
