Release Valve Shim Kit
The shim kit effectively shim???s the PRV (pressure relief valve) increasing its ???pop off??? pressure, thus reducing fuel being returned to the tank by the PRV. The Release Valve Shim Kit eliminates low fuel pressure rail diagnostic trouble codes (DTC) such as DTC P01093 (low fuel pressure during power regiment), help maintains fuel pressure during full throttle driving. Available for 4.5-10 Duramax Diesels (LLY/LBZ/LMM).
More fuel pressure equals more power and with the PPE Release Valve Shim Kit, you get both. The Release Valve Shim Kit increases the pressure needed to ???pop off??? the pressure relief valve (PRV), which means that the available fuel rail pressure remains high during full-throttle driving and reduces the fuel flow through the fuel rail return system. The PPE Release Valve Shim Kit eliminates low fuel rail pressure DTC codes P1093 or P0087 (low fuel rail pressure during power enrichment) and is recommended for high performance and/or race applications.
Note: ???Legal in California only for racing vehicles which may never be used upon a highway.???