Rail Cap 6.7 Liter Cummins / 6.6 Duramax

Rail Cap 6.7 Liter Cummins / 6.6 Duramax

Customers seeking maximum rail pressure commonly see issues resulting from a failing PRV (Pressure Relief Valve) mounted in the fuel rail. This Rail Cap is an OEM replacement part that eliminates fuel return from the rail, maximizing fuel pressure to the injectors

Our Rail Caps are made from 304 Stainless Steel. Our competitors on Ebay are using a bolt design made from mild steel which will corrode and contaminate the fuel system.

We are convinced that our Rail Cap is the right way to solve your PRV issues long term with NO ill side effects from corrosion.

Rail Caps are a performance part, they should always be used in conjunction with a rail pressure gauge.