Hp gain from .25 inch bigger y pipe and high flow cat
02-20-2011, 05:52 PM
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Hp gain from .25 inch bigger y pipe and high flow cat My cat was bad so I bought a new magna flow y pipe and high flow cat. Ya I know should have just gutted cat but I have e check this summer, and I can't afford headers, I'm 21 and going to school I don't have the cash or time to have the car down since I commute. My question is how much will I gain if any hp from a .25 inch increase in y pipe size and a high flow cat? Thanks
