Wear at the inboard end of the boost regulator bore in VW/Audi 01M, 01N and 01P units can reduce the ability of EPC/TV pressure to stroke this valve open. Full boost exiting this valve combines forces with the main regulator spring, increasing line pressure. Sonnax oversized boost regulator valve kit 119940-05K allows the valve bores to be refurbished. Oversized hard-coat anodized aluminum valves restore hydraulic integrity of the circuits andprevent wear A replacement ratcheting end plug is included, as the OE one often breaks An adjustment tool is provided for repeated assembly, disassembly and adjustment of the ratcheting end plug Contents Valve Ratcheting End Plug