Cusco Type RS 2 Way Limited Slip Differential Rear | Mazda MX-5 (89-93) (LSD 120 F2)If you need the absolute best in traction for your Miata, a Cusco LSD (Limited Slip Differential) is what you seek. Cusco LSDs allow you to chose 2 of 3 settings with each unit just with a simple overhaul. In the Type RS, it's springs absorb the initial torque. Compared to the Type MZ, the Type RS' initial torque comes on more gently. The response of the RS has lower friction and in turn, is better. The Low Initial Torque means Less Power Loss. This