I have been running my Berk HFCs with my 12" resonated FI exhaust and love it. The perfect amount of volume with no rasp, yet can be reasonable while cruising or nice and loud when you get on it. There is some hiss for sure, but it is nothing unreasonable and gets less noticeable once the car warms up. I am going to try wrapping my X pipe with some exhaust wrap to see if that makes a difference.
Here is a video of what the exhaust sounds like. First is a cold start:
This is some spirited driving through some canyons yesterday:
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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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