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Old 11-09-2014, 06:37 PM   #355
sw20kosh
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you have to get rid of that stock muffler. the baffles inside of it cannot deal with a catless header as you can hear from the rear. replace it with a non-baffled muffler (aka a straight through design).

as for the metalic sound from the header itself, every stainless steel catless header makes that noise. the stock header is very good at reducing that metalic rasp noise.
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