my berk HFCs made my maganflow sound like **** it was VERY raspy at wot i took them off now my MAGNAFLOW sounds fantastic,,, if anyone wants them PM me,,,im buying resonated HFC to see if it will be better
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08 G37s 6MT//UPREV//INJEN CAI//BERK HFC//20%//BATOVERLAYS//EIBACH//GTSPEC/
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