D drobdavis New member Feb 28, 2011 #1 how much hp is to be found on a set of headman headers that hook up to your y pipe and are they worth getting a set ? i do have an air intake, 2 high flow cats, 2 highflow mufflers.
how much hp is to be found on a set of headman headers that hook up to your y pipe and are they worth getting a set ? i do have an air intake, 2 high flow cats, 2 highflow mufflers.
