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TPAJETSKI · 01-20-2014, 03:22 PM

Somewhat off topic but don't headers improve power and gas mileage? If so, why doesn't GM build the things with headers?

01-20-2014, 03:22 PM	#5
TPAJETSKI Drives: Camaro Join Date: Apr 2012 Location: Florida Posts: 710	Somewhat off topic but don't headers improve power and gas mileage? If so, why doesn't GM build the things with headers?