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10-19-2006, 11:56 AM
(This post was last modified: 10-19-2006, 11:56 AM by NikiterZTS.)
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
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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.
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thats exectly what i was thinking
2002 Ford Focus ZTS (Gave it away)
125whp/129wtq
2006 Subaru Impreza WRX with JDM 6 speed
207whp/273wtq Innovative tuned on Mustang dyno (Stage 2)13.9@99mph
320whp/330wtq Innovative tuned on Mustang dyno (Stage 3)
352whp/360wtq Dynojet
13.3@106mph
2004 Ford F-150 Lariat
2008 Honda CBR600RR "Silver Bullet" R.I.P.
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2001 Honda CBR F4i Stunt bike "Burn the Rubber, not your soul"
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And where else to put a high flow cat.
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but if u stick with stock header, then no point in changing flex right? Just do catback?
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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?
[right][snapback]212436[/snapback][/right]
stock header= not needed, may help a tiny bit, free flowing can never be a bad thing
aftermarket header= must be done!!!
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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.
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