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+--- Thread: Is There A Point? (/showthread.php?tid=7788)
Is There A Point? - NikiterZTS - 10-19-2006
simple....if i'm gonna do my race header...is there a point of changing my stock flex pipe to an after market one?
tell me your opinion
thanks
Is There A Point? - dBlast - 10-19-2006
Yes.
If you don't then the bottle neck will be the flex pipe. The race header will probablly have a 2.25 or 2.5 inch exit going into the smaller stock flex then going back out to your aftermarket 2.25 or 2.5 inch exhaust.
Is There A Point? - NikiterZTS - 10-19-2006
thats exectly what i was thinking
Is There A Point? - Focus man. Focus. - 10-19-2006
And where else to put a high flow cat.
Is There A Point? - cornflakes - 10-19-2006
but if u stick with stock header, then no point in changing flex right? Just do catback?
Is There A Point? - ZX5focused - 10-19-2006
cornflakes,Oct 19 2006, 12:14 AM Wrote:but if u stick with stock header, then no point in changing flex right? Just do catback?
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stock header= not needed, may help a tiny bit, free flowing can never be a bad thing
aftermarket header= must be done!!!
Is There A Point? - ZX3TUNING - 10-19-2006
any way you look ay it the flex pipe is a restriction.
in the stock system it is not the biggest, but it still is a restriction.
with a race header, it will become a BIG restriction in the system.
also, not all race headers have a 2.25" exit, and there are only 2 with 2.5"(Kamikaze and JBA longtube), so choosing the right flex is important along with the in the grande scheme of things.
if you have a 2.25" exhaust a Kamikaze or JBA header would be a bit redundant as you want to try and keep the pipe sizing uniform thought the exhaust to minimize flow irregularities in the system.
on a side not, unlss you are planning to run a SC kit, there is no need for a complete 2.5" exhaust.