Ive ran an uncatted UEL header with an otherwise stock exhaust system for a bit.
it gets slightly louder.. just a tiny bit. like.. miniscule.
youll notice more engine noise and harmonics from your footwell. but thats about it.
I had to run it after i went decatted as the combo header overpipe stock midpipe and catback i had was a bit obnoxious
current set up is the catleass gruppe S header and overpipe to stock midpipe and out to the HKS Hi po single tip v2.
the ace header is the best of the best, but you can get like JDL or gruppe s header for less than half the cost and youll get near the same performance. esp with the midpipe and axle back being OE.. the axle back on the stock cars is kinda wimpy..
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