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05-22-2000, 07:40 PM
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#9 |
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Registered Member
Join Date: May 1999
Location: Blacksburg, VA
Posts: 1,526
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The cats are the biggest restriction in the stock exhaulst, followed by the stock manifolds. That's why a cat-back by itself does almost nothing, and headers by them selves only do a little.
If you replace the stock h-pipe and cats then headers make much more of a difference, especially as you open up the intake. Look at Bad Dad's before and after dyno numbers. 307 rwhp. That's a pick up of 32 hp. I would be very surprised if the headers didn't contribute quite a bit to that. |
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