New DISA Valve Replacement O-Ring custom made from high-quality silicon for a precise fit. Silicon offers excellent heat and wear resistance and will last the life of the engine.
Replacing the stock O-ring, which typically fails over time, can help eliminate the "System too lean" P0171 and P0174 codes. This O-Ring is strongly recommended to replace the stock custom molded gasket on the M54 DISA valve.
Note: Our DIY DISA kits already include the Silicon O-ring, no need to order it separately!