i order greddy exhaust today and the guy told me they didnt make any cat for the 1st gen altima. is he right? then he told me i should get a test pipe which is against the law but will i get better performance out of it?
will [email protected]
I have a Test pipe for racing , and it is VERY loud with it in !!! , I would suggest either leaving the stock cat , or getting a universal high flow cat and having it welded in !!!!! Oh and I notice a gain only in highend HP with the test pipe , like 4000 and over !!