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it was good for about 20-25 RWHP. I was at 425 before this on one dyno, installed the 90/90 and a year later and more tuning, I peaked at 456 RWHP, but Id say safely 20 RWHP. My thinking was I wanted a bigger cam, but when the FAST came out, I thought go with a bigger manifold, and lose no drivability with my smaller 228R cam, and the car cam out really balanced.
12-17-2016, 07:04 AM
