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Message: <blockquote data-quote="kolamp" data-source="post: 27053" data-attributes="member: 22825"><p>Good day to all fellow beemers,Got some q's regarding the performance exhaust for N52 325i engine. 1. I noticed there's a valve at the exhaust tip and after googling around found out that the exhaust is meant for 330i not for 325i. Is it OK for N52 engine to use 330i exhaust?2. From my dyno butt run, I do feel a little loss in low end torque after installing the exhaust. Should I connect the valve at the exhaust tip to control backpressure? I read on the net some said just leave it in open mode.3. I read US version got midpipe with muffler while Euro version only muffler available. Should I do custom midpipe?Thank you for viewing</p></blockquote><p></p>