I don't know answer to your question but you can't go wrong with either. I have heard good things about berk. I have stillen and it's very nice also. Deep growl
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Evo-R CF fang | CF Mirror covers | 20/25 H&R spacers | RE-11 | TopSpeed exhaust + y-pipe | Stillen HFC | Carbon Fiber Amuse rear bumper + Amuse Spoiler | PWJDM
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