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Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

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 06-03-2010, 10:50 AM   #1
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Join Date: Sep 2008
Location: Rochester, NY
Posts: 4
My Ride: 2001 330i
Strange sound, think I need to replace my exhaust. Recommendations?

For the past year or so, my car has been making this odd metal-on-metal rattling when under stress (starting from a stop, very low RPMs, when the AC kicks on, etc.) Around the same time, I also started to lose 3-4mpg in highway gas mileage (not entirely sure if that's related.) I brought it to the dealership, and they identified it as the inner wall of my exhaust pipe rotting out. They offered to replace it, but wanted nearly $2000 for it. So, I'm thinking I'll just do it myself.

Herein lies my problem though - What should I replace it with? I don't think I want straight up stock, but I don't want something completely obnoxious or ridiculously expensive either. Any recommendations?
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