Pitching the stock differential out from under a GM car in favor of a 9-inch Ford has always been the best way to step up the drivetrain for drag racing. Since the price of used 12-bolts has ...

Performance is typically gained by exchanging stock pieces for readily available aftermarket parts and systems. Or, in some instances, one-off or custom treatments are used for making big steam. The ...

So you bought a 335i, because let's face it, they are a performance and luxury bargain, and you want to modify it, make it faster and improve its handling. But BMW never offered a factory limited-slip ...