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04.5-10 GM 6.6L Duramax Race Fuel Rail Plug

The Sinister Diesel Race Fuel Rail Plug replaces the stock or shimmed pressure relief valve. Removing the stock pressure relief valve will help maintain fuel rail pressure during full throttle driving by completely blocking the pressure relief port. It also helps eliminate low fuel rail pressure DTC codes (P0087 and P1011) that are caused by insufficient PRV spring pressure. To prevent any leaking from a possibly damaged stock O-ring, a new O-ring has been included in the Sinister Diesel Race Fuel Rail Plug kit.

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