The PPE Race Fuel Valve (heat-treated stainless steel) replaces stock or a shimmed pressure relief valve. This valve helps maintain fuel rail pressure during high engine load conditions. It eliminates potential low fuel rail pressure DTC codes P1093 or P0087 (low fuel rail pressure during power enrichment) that are caused by the compromised factory valve spring. Low fuel rail pressure can result in reduced power, higher EGT, worse MGP, and excessive soot. Comes with the Viton O-ring installed. Separate additional Viton O-Ring available SKU 113073001. GM Equivalent P/N: 97371618 Mopar Equivalent P/N: 68005441AA Cummins Equivalent P/N: 4938005 Bosch Equivalent P/N: 1110010013 Learn more about the 2004.5-2010 GM 6.6L Duramax and 2007.5-2010 Cummins 6.7L Race Fuel Valve from Diesel World Magazine.