ATS Pressure Relief Valve Block Off 04.5-10 GM 6.6L Duramax

All of the 2004.5-2010 6.6L Duramax engines 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 aftermarket tuning is 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 fuel rail plug will block off the relief valve located on your fuel rail, ensuring that ALL rail pressure is delivered to the injectors, gaining power on the top end.