Not Ranked
The performer RPM bolts up to the Ford Racing aluminum CJ heads, but the mismatch in the ports is shocking. The runners in the intake are at least 25% smaller than the ports on the head.
With that said, it is the standard manifold shipped with the 486hp/460 and works wonderfully at that power range. The engine pulls so hard from 5k to 7k, a rev liliter is manditory. 1st gear unwinds from a dead stop in 1 second.
Any ideas on why/how a terribly missmatched runner intake can run so good?
Bob
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