E46Fanatic
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I am also pretty sure, if it fits the 325i (2.5 ltr) BMW performance unit would have spec'ed it for the 325i to sell more units of the exhaust system. No one has ever fitted it on a 2.5 ltr I believe. checked the Exhaust diameter (single pipe to the muffler) and it seems like its still 65mm for the 325i (same as 330i). The diameter of the twin pipes leading from the headers/precats is 55mm for the 330i and Perf Exhaust. No idea how big it is for the 325i tho.