Viton O-Ring Seal for S54 Constant Pressure Valve

The stock rubber seal on the S54 constant pressure valve is a well-known source of an S54 oil leak. The seal hardens and flattens over time, allowing oil to leak past and all over your engine block, transmission, and driveway. This stronger Viton fluoroelastomer o-ring is much better suited for this location and use. It will resist deformations and leaks much better than reinstalling a stock CPV. There's no need to replace a $40+ valve when the problem is a $5 o-ring.