please refer to these for further information

The Dual Port is a 50-50 vent-to-atmosphere/recirculating valve

Torque capacity 660Nm

Torque capacity 1170Nm

This part is intended to cover the additional TPMS hole if wheel has two air valve holes and car doesn't use TPMS

Clutch Kit - Xtreme Performance Heavy Duty Cushioned Ceramic 750Kg (30% inc.) 490Nm KMI23003-1C CVR4 please refer to these forXtreme Performance Cushioned Ceramic kit 1C Recommended for: Motorsport ApplicationsThese kits are available with cushioned ceramic friction discs and are designed for motorsport applications where higher heat and torque capacity is required. These can also be used in some road applications. Specifications: Torque capacity 490Nm Clamp load 750Kg 30% Increased over standard Cushioned Ceramic Friction Disc Heavy Duty Pressure Plate Kit contains