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Published on May 24, 2008
unitedBMWonline is proud to offer you the sound of the stock 135i exhaust vs the BMW Performance Exhaust. The install should take about 30 minutes to 60 minutes. You will have to cut (like any other BMW Exhaust Install) the first set of resonators off, and replace it with the piping and muffler provided with the BMW Performance Install kit.
The Convertible has the stock exhaust, and the Coupe has the Performance exhaust.
If you are a current 1 series owner, we offer this exhaust for the 128i and the 135i.