Fits 1/8 NPT port

This is likely because the plastic valves typically found in OEM setups would not be capable of handling the A45's 26PSI of boost without failing prematurely

This will give you the competitive edge

while its precision billet construction gives better sealing and durability

Clutch Kit - Xtreme Performance Heavy Duty Cushioned Ceramic 270Nm KNI18001-1C SL-01 Fits 1/8 NPT portXtreme 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 270Nm Clamp load Increased over standard Cushioned Ceramic Friction Disc Heavy Duty Pressure Plate Kit contains everything you