Forged Diesel Stainless Steel Fuel Rail Race Plug, 

2001, 2002, 2003, 2004 GM 6.6L Duramax LB7

Forged Diesel parts are made with the highest standards to offer the best in quality and affordability.

Replaces stock or a shimmed pressure relief valve to help maintain fuel rail pressure during high engine load conditions. Eliminates low fuel rail pressure DTC codes P1093 or P0087 (low fuel rail pressure during power enrichment) that are caused by insufficient pressure relief valve spring pressure returning fuel to the fuel tank.

Replaces# ZZ-0181