your friend would b better off getting a high flow catalytic converter instead of a straight pipe... a car w/o a cat sounds horrible and the difference in power between a hi flow cat and a straight pipe is almost imperceptable, but the emmissions smell like pure fuel w/o one. right now i have no cats and i am searching for a replacement hi flow cat for the one i removed. btw, not having cats in california is highly illegal and i am under risk rolling w/ my straight pipe.
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