Cylinder heads are understandably a vital ingredient in any recipe for "porcupine" horsepower pie, so whether the big-block in your Corvette is being built for street performance, drag racing, road ...

If one of the best forms of flattery is imitation, then Chevrolet's heavy-duty parts program has reason to be proud—lately it seems everyone and his uncle has started a factory performance parts ...

While the design changes were obvious and the flow numbers looked promising, the bottom line is how they stack up in power production on the dyno. We already had a fresh '71 440 Six Pack motor on the ...

Indy Cylinder Heads built this 500ci all-aluminum big-block wedge for PHRs Project Valiant and in this dyno test it made 657hp at 6,100 rpm and 662lb-ft of torque at 4,500 rpm.