ATS 7050502326 Pressure Relief Valve Block Off 6.7L Cummins / Duramax ATS-2019012308 With a 4" inlet

With a 4" inlet

This differential cover is constructed out of durable A356-T6 cast aluminum with reinforcing ribs for maximum strength

These tips come as set and have a mirror polished finish

it looks pretty sweet

ATS 7050502326 Pressure Relief Valve Block Off 6.7L Cummins / Duramax ATS-2019012308 With a 4" inletAll of the Common Rail Cummins and Duramaxs feature a relief in the fuel rail which is designed to relieve pressure once it sees roughly 25,000 PSI to avoid damage to the stock injectors. However, most chips and programmers are designed to deliver pressure higher than this, causing the higher pressure fuel to not get to the injectors, losing power, and eventually causing the failure of the stock pressure relief valve. This simple device will block off