The GM LS3 is a great engine, Racing Head Service intends to make it even better with their new Pro ActionTM Rectangle Port Aluminum Cylinder Heads.

Ben Strader of EFI University has assembled a 9,500 rpm, naturally-aspirated destroked LS engine -- that makes almost 2.5 horsepower-per-cube -- for use as a demonstrator in his Competition Engine Design class.

RHS is bringing their customers another great product with the 24 degree Aluminum Intake Manifold for Big Block Chevrolet Engines. This intake has some great features that racers will love.

When it comes to engine breathing, the cylinder heads are the "switch" that allow it to inhale and exhale.

When the heads need rebuilt, should you rebuild or get new aftermarket units. We breakdown the choices.

All sorts of new goodies in the COMP Cams and Racing Head Service booths at SEMA - new Coyote camshaft cores and LT1 direct-fit and hybrid LS/LT1 retrofit cylinder heads, and more. Killer performance ahead!

It's time for a fresh look at aftermarket blocks for your next LS build, with something for every budget and horsepower level.

Old school doesn't have to compete with new technology, because the COMP Performance Group (CPG) allows you to get their parts catalogs mailed to you - or you can download them for free. The best of both worlds.