Thread: Comparison Vid: Stock, Stillen, and Berk :)
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Old 03-28-2010, 08:59 PM   #21 (permalink)
spearfish25
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Quote:
Originally Posted by EVL370 View Post
So in a nut shell its safe to say the Stillen, Berk, F.I cat backs will all give 15whp increase.

But doesnt the Stillen run a Y-pipe? The dyno's and website claims a 18whp increase. Is that right? Where would the design of the stillen exhaust make up the numbers due to the setback of having a Y - pipe? I was under the impression the best gains come from a X-pipe, Please correct me if I'm wrong....
I can't show modeling equations or anything, but if the Y-pipe is designed well and has a large enough diameter where the Y merges, it shouldn't be restrictive.
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