HFC's do not have rasp
Some test pipes do at certain rpms
When I had APS TP on my 350z the rasp was from 3200rpm-4200rmp under WOT
But I thought it sounded good I also Had Megan Racing Headers,Borla TD
DAN
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-My BRZ with exhaust will decimate all if we overnight parts from Japan-
10 Civic EX Sedan- Current Daily
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