In our May '03 issue we introduced the Performer RPM II intake manifold from Edelbrock ("Biting Back," p. 52). A promising revision of the long-popular Performer RPM for fuel-injected 5.0 engines, the ...

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 ...

One of the easiest ways to tune an engine's performance is with the intake manifold. Yes, the camshaft can have a bigger role in horsepower production, but a camshaft swap includes real work and more ...