It is not just the HFCs. It has more to do with the cat-back as I have the 12" resonated FI exhaust behind my Berk HFCs and I have zero rasp. Other exhausts like the Invidia, Amuse, Greddy, and other exhausts also have no rasp with HFCs or test pipes either.
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-320whp / 259wftlbs-
SP Rays -- RE-11s -- SpecialtyZ Tune -- Swift Springs -- Stillen 25R Oil Cooler -- Stillen G3 Intakes -- Berk HFCs -- F.I. 12" CBE -- Stillen Sway Bars -- Es14 Spring -- INGS+1 lip -- CF Spoiler -- GTR Start Button -- VLED Parking Lights -- PWJDM V2 shift knob
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