03-27-2006, 02:52 AM
i know the high flow cat has to go just after the flex but how big should i go. i can get various sizes through work. 12" overall lenght seems to be the favoured size but would a 18" overall have better emission or will it not work as good because it wont get as hot. also will the larger cat kill most if not all of the shiity ass raspy sound a MBRP makes without a cat. im running a OBX race header and soon to be either ZX3 or SVT MBRP. thanks.
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