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Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

 
 
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Old 10-15-2008, 11:21 AM   #1
nleksan
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330-style Exhaust onto 328Ci (switch from "single" to "True dual")

I know something similar was asked recently, but my question is slightly different. I have a 328Ci, which as we all know, is a 2-1-2 exhaust. Now, I don't like having two tips but only being a "single pipe" system. I can't imagine it takes advantage of potential "flow" capabilities, so I want to go with a true-dual exhaust from the headers-back.

Would it be as simple as buying a 330Ci exhaust (rather, an aftermarket exhaust designed for the 330Ci), cutting off the flanges that connect the exhaust to the headers, and re-welding them to the proper angle? I can have the labor done for little to no money, so it's not an issue.

What I want to know is:
Will there be any noticeable benefit doing this as opposed to just getting a full-exhaust designed for a 328Ci? I will be supercharging the car (ESS TSx), so I would think the extra flow would help the car N/A AND FI. Is this the case?
Will this improve the sound over a comparable aftermarket 328 exhaust, or will it sound worse? I imagine it would be a bit louder, but not terribly. "Volume" isn't at the top of my worries at all.
I'm going to be installing eBay headers soon. Should I get the 328 Headers and just figure out how to bolt on a 330 exhaust, so that the only "flanges" I'm messing with are on the easier-to-access part of the headers (the exhaust's flanges to mate the headers, not the header's to mate the exhaust's)?

Thanks!
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