I've seen ALOT of threads about the exhaust pipes and diameters. So here's one more. And yes, i've read most of those threads. Also there might be a small chance that I don't always understand exactly what part are we talking about. I've got the 4-2 header from F22A3 and also downpipe,flexpipe and the cat (all OEM). Rest is missing. The diameter should be 1,75" if i'm not completely wrong. The question is, does the 2.25" cat back fit on oem cat and should i change also the front end of the exhaust system to 2.25" to get the best from it (how big is the difference)? And no, I don't have afford to buy whole exhaust piping from big brands cause I would've done it already. I've also thought of buying the aftermarket cat back which i know will fit but don't know if i can gain any compared to 2.25".
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OEM front exhaust system to 2.25"?
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Ok. Thanks! What about the performance issue. I'm going to get the deevergote's 30+ thread parts on F22A1, so what kind of gain there is on 2.25" compared to oem 1,75" cat back? Cause i like oem, who wouldn't but if there is possibility to gain something with the bigger pipe then i'm thinking about it.
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