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      01-31-2013, 02:23 AM   #12
New Member

Drives: 08 e90 M3 (Jet Blk / Blk)
Join Date: Jan 2010
Location: NJ

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Originally Posted by AW750Li View Post
what did bmw say when you brought the car in with the x pipe? I might be interested
The dealership didnt seem to care at all. I even had an O2 sensor replaced under warranty and nothing was said about the X-Pipe. Some dealerships may say something, but I dont think you'll have a problem as the primary cats and O2 sensors are still there. You can also have your stock X-Pipe welded back in, in case you have to go back to stock.

When my lease was up I had my stock pipe welded back in and was not charged for anything. According to my client advisor, the car was CPO'd and sold a month later.