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Old 03-28-2010, 08:30 PM   #19 (permalink)
EVL370
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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....

Last edited by EVL370; 03-28-2010 at 08:32 PM.
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