These are manufactured with a 1/4″ UNF

Wisefab narrow lock-kit for BMW E46 is similar to the PRO kit but has fewer features and does not widen the car as much

High torque sprung driven discs (common hub)

Un-Terminated Flying Lead

Torque capacity 1200Nm

Clutch Kit - Xtreme Outback Heavy Duty Sprung Ceramic Incl Flywheel 930Nm 1250KG (25% inc.) KNI25509-1B JR5 These are manufactured with aXtreme Outback Heavy duty sprung ceramic kit 1B Recommended for: Motorsport Applications Xtreme Outback Ceramic upgrades have been designed to offer the ultimate in heat capacity for single plate upgrades and are designed specifically for motorsport applications such as endurance rally events and time trials. Available in Sprung Ceramic and Cushioned Ceramic, there are a wide variety of options to choose from depending on the vehicle use.