Performer S/B Heads
Designed for 302-400ci engine up to 1986, these aluminum heads feature 185cc intake ports and 64cc combustion chambers. The combustion chambers are designed to improve performance and retain stock compression ratios on 1970 and earlier small blocks.

Performer Centerbolt Heads
Designed for 1987-95 Chevy 5.7L engines originally equipped with centerbolt valve covers. These aluminum heads use the 1987-95 intake manifold bolt pattern. The high velocity ports work with either TBI or Tuned Port Injection systems. They maintain stock compression when used with the recommended gasket. These heads will accept the stock centerbolt valve covers or the Edelbrock aluminum valve covers, P/N 350-4246, 4247.

Victor Semi-Finished Heads
Victor Semi-Finished Small-Block Chevy Heads are designed especially for custom applications. These unported versions of Victor heads for the professional cylinder head porter or engine builder As-cast ports have enough metal thickness to allow for CNC porting to different sizes Seats and manganese-bronze valve guides included (except #77539 and #77549), but not installed.

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