OS Giken specializes in limited slip differentials, heavy duty clutch kits and performance drivetrain parts. The OS Super Lock LSD is able to achieve complete lock in a progressive, smooth, and quiet manner. This effort translates to quick lap times and repeatable tuning and performance. OS Giken integrated clutch and flywheel packages increase transmission efficiency and engine response. Beefcake Racing is an Authorized Dealer call 1-855-827-7223 for more info and best pricing.