borla exhaust - ZR-1 Net Registry Forums

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

Z Factor · 09-22-2005

Quote:

Originally Posted by blackjack

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

I can only say that the most HP gains have come from B&B based on everything I read and heard over the years. Additionally, I don't know what mods you have, but to reach 400rwhp you need more than just bolt-ons like a cat back system or even headers. Lastly, you will need a 3" rather than a 2.5" system if you want maximum HP.

We Gone · 09-22-2005

From what I have read over the years a cat-back system will net you around 8-12 HP..add headers and you get another 8-12..

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

09-22-2005	#3
We Gone Join Date: Apr 2004 Location: ATL. GA. Posts: 2,170	From what I have read over the years a cat-back system will net you around 8-12 HP..add headers and you get another 8-12..