Not to be outdone in the aftermarket-parts goldmine, BMW is launching a line of factory performance parts that will challenge those from tuning shops. Apparently, the line only includes gear for the Z4 and 3 Series, with a concentration on the last-gen model. To wit: BMW claims a performance exhaust offers five more horsepower at a reduction of 8.8 pounds, and an engine kit for the 330 adds 10 horsepower and 8 lb-ft of torque. Also in the catalog are a shift kit, suspension hoo-has, drilled brake rotors, an air intake, and wheels. We'll hold out for the V10 crate motor for our Mantamino project, thanks. [Automobile]