cuben is right. I have a sr20det in my 96 240 and i am still running stock exhaust. I got a stock down pipe with my engine which lined up exactly with my cat. I didn't need to change anything, well anything for exhaust. I am looking for N1 turbo cat back cause i heard that I will get like 50 rwhp cause i have 3" downpipe, 3"cat, and soon a 3" exhaust...
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