Thread synopsis: The 335iís Steptronic transmission/cooling system configuration is intended for street use. If youíre an experienced track driver and there's a chance you might track your 335i someday, make sure you get a car with a manual gearbox (and ZSP). Even then, the car will still have an open differential (one-wheel-drive) and run-flat tires that aren't intended for track use anyway...
2007 BMW 335i Sedan, 6MT, ZSP
2004 BMW M3 Coupe, 6MT