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 ...

For years LT1 enthusiasts have been running well into the nines with factory LT1 and LT4 intake manifolds. With some porting the factory castings have proven capable competitors, even on big-cube and ...