Stillen Exhaust with Berk HFCs

semtex

Well, that's the funny thing. Stillen claims +18 whp from their cat-back. Berk claims +19 whp from their HFCs. Now, we all know that we can't expect to just add the two together and expect a total gain of +37 whp, right? Yet . . . that's pretty much bang on what happened. If we use the 254.2 that Mike got from bone stock as a baseline just minutes before I put my car on the same dyno, then we have a gain of 37.5 whp. 'Ricer math' actually appears to have worked in this instance! So, to answer your question, if we go back to the claimed numbers from the manufacturers, it would appear that it's almost an even 50/50 between the two components.

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"There are no small accidents on this circuit." -- Ayrton Senna
316.8whp & 248 ft/lbs (Dyno Dynamics) | 319whp & 256 ft/lbs (DynoJet) (04/23/10)
Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf.