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Z4M_Coupe · 01-03-2019, 02:50 AM

ARH headers gave me big top end hp, but completely destroyed my low end. Under 6,500-7k rpm my car wouldn't move -_-

01-03-2019, 02:50 AM	#13
Z4M_Coupe Lieutenant 201 Rep 461 Posts Drives: Z4M Join Date: Aug 2017 Location: SoCal iTrader: (6)	ARH headers gave me big top end hp, but completely destroyed my low end. Under 6,500-7k rpm my car wouldn't move -_-
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