The BMW Performance line of parts has been available for the 1 Series for some time now and the line for the 3 was recently introduced.
Since these parts are designed, and installed by BMW certified technicians they will carry a BMW warranty. These parts are installed after purchase and not at the factory. Many of the parts will be available at your local dealers now though the full line should be available by April of ’09. Here are a few pictures and we will continue to update as we acquire more info.
Link to UK Brochure
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