Bosch Pressure Relief Valve (PRV) 01-04 GM 6.6L Duramax LB7 WSF-WS8-2-KA-CER-BLA or you could upgrade with

or you could upgrade with a billet replacement from Industrial Injection

MagnaFlow performance diesel exhaust comes with a lifetime warranty

Please choose whether your truck has the factory speaker in the A-Pillar or not from the drop down menu below:

Featuring injection molded MAF(Mass Air Flow) plate and IAT (Intake Air Temp) sensor port that insures a true o-ring seal to the sensor

Designed for use with ATV and UTV winches

Bosch Pressure Relief Valve (PRV) 01-04 GM 6.6L Duramax LB7 WSF-WS8-2-KA-CER-BLA or you could upgrade withIs your LB7 Duramax getting hard to start or feeling like it doesn't have the power it used to? Its likely that the pressure relief valve located on your Function Block needs to be replaced. This Pressure Relief Valve (PRV) is responsible for controlling high pressure fuel and bleeding off excessive pressure back into the fuel system when warranted. Because the valve is just a simple spring, it can wear out, causing pressure to be relieved too early,