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blackjack · 09-22-2005

hi,guys
i have read over the years that the borla exhaust system does not add
any hp because the two pipes in front of the resonator are restrictive...
somebody knows more about that? is it worth changing just those two sections? is 2.5 inch big enough for 400 rwhp ?
blackjack
91/1735

09-22-2005	#1
blackjack Join Date: Aug 2005 Location: north of montreal Posts: 510	borla exhaust hi,guys i have read over the years that the borla exhaust system does not add any hp because the two pipes in front of the resonator are restrictive... somebody knows more about that? is it worth changing just those two sections? is 2.5 inch big enough for 400 rwhp ? blackjack 91/1735