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Old 03-12-2014, 10:44 PM   #1
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Headers

Was wondering which would be best for power/sound. I'm set on getting American racing headers to compliment my borla s type catback, was wondering which is better, x or h pipe and cats or no cats.
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Old 03-12-2014, 11:05 PM   #2
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I have pypes LT o/r x flowmaster catback and it sounds like a nascar bro, dunno bout power cause I haven't dyno but you can feel it
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Old 03-12-2014, 11:22 PM   #3
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Typically x pipe is more of a loud nascar type (raspy) sound but creates more HP. H pipe will be deeper but creates a bit less HP. Going with no cats will increase a bit more power than going high flow cats but depending on ur emission testing u can decide if the extra HP is worth it.
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Old 03-12-2014, 11:29 PM   #4
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Well I live in Canada so emissions doesn't matter, was more or so concerned about the back pressure or any problems from removing the cats etc
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Old 03-13-2014, 12:09 AM   #5
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Quote:
Originally Posted by Bladezx View Post
Well I live in Canada so emissions doesn't matter, was more or so concerned about the back pressure or any problems from removing the cats etc
If emissions doesn't matter then I'd go catless..it's cheaper & makes a little better power!
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Old 03-13-2014, 04:15 AM   #6
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Do you think a dealer would void warranty if I went with high flow cats for the x pipe?
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Old 03-13-2014, 04:36 AM   #7
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Do you think a dealer would void warranty if I went with high flow cats for the x pipe?
I don't think high flow cats vs no cats will make a difference when it comes to voiding warranty. For them to void the warranty they have to prove that whatever mod u did caused the problem.
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Old 03-13-2014, 07:14 AM   #8
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I did the O/R X pipe and Pypes cat back. I can attest to the raspiness of the sound, which I like! The cat removal did increase power a bit, loudness more, but be prepared for more exhaust smell from your car. It doesn't bother me, but something to take into account. Lastly, lsometimes" a set up like this throws a P-219a code, exhaust pressure sensor. Mine did it repeatedly... I even bought a second O/R X pipe, different brand, and mine still threw the code almost every 2-3 cold starts, 5 miles out-P-219a. Steeda re-tuned me, for free I might add, and adjusted sensitivity to the code or turned it off? Anyway, no more P-219a code for me. Not saying this will happen, but some 5.0's have had this issue when the exhaust flow becomes more free-flowing, I think the ECU assumes there is an exhaust leak and is asking you to address it.
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