Yes, the new Edelbrock Performer RPM heads are good. On our 2006 5.7L-based test engine, we picked up 49 hp and 28 lb-ft of torque by simply bolting them on. The heads are available with three ...

With the Edelbrock Performer RPM Power Package, for instance, you have a system that provides optimized performance: 64cc aluminum cylinder heads that have been matched to a dual-plane intake manifold ...

In our last installment, we visited RaceKrafters Automotive Machine in Lancaster, PA to test the Edelbrock RPM Air-Gap LT1 Intake Manifold on a nearly stock 355cid LT1. Using a much smaller plenum ...

So what can we conclude from this battery of swaps, tuning, and tests? That it takes a community to raise horsepower. By "community" we mean proper packaging of components and tuning to achieve the ...