dealer-installed accessories

In years past, upgrading a car for better performance usually meant going to the aftermarket for lighter wheels, bigger brakes, enhanced aerodynamics and additional horsepower. Manufacturers have since gotten smart, and many now offer in-house performance part divisions to keep customer dollars captive. After all, why take chances on a third party accessory when you can buy one from the same company that built your car, complete with a manufacturer’s warranty? That’s the thought behind BMW’s M Performance parts, already available for the BMW M3, 1 Series M, X5 M and X6 M...