In 1974 with the rising popularity of power adders such as Nitrous,Superchargers & Turbochargers, McLeod recognized the need for a clutch assembly that was street friendly, yet still capable of handeling up to 1,200 horsepower, thus the Street Twin was born! This series of McLeod clutch kit is intended for high horsepower street enthusiast. Wheter it's NOS,Supercharger,Turbocharger or a Big Inch mountain motor the "Original Street Twin" can handle it. Kit includes clutch, aluminum flywheel, throwout bearing, adjustable pivot ball and alignment tool. Go with the innovater not the imitator McLeod Racing!