These kits are the perfect solution for trucks with bigger turbo kits and injectors that have reached the limits of the stock HP4 pump and are in search of more power. - Sportman (WCF100455)-?A?great choice for trucks looking to replace a failed HP4, or...

These kits are the perfect solution for trucks with bigger turbo kits and injectors that have reached the limits of the stock HP4 pump and are in search of more power. - 10mm (WCF100456)-??This pump pairs well with S372, S463, and S467.7 turbochargers and...

These kits are the perfect solution for trucks with bigger turbo kits and injectors that have reached the limits of the stock HP4 pump and are in search of more power. - 12mm (WCF100457)-? Works best with S472 and S476 turbochargers with Exergy 100%...

These kits are the perfect solution for trucks with bigger turbo kits and injectors that have reached the limits of the stock HP4 pump and are in search of more power. - 14mm (WCF100458)-?Ideal for built competition engines using power adders, big single or...

The return fuel pressure test port for the 2011-2016 LML Duramax is designed to aid the technician in troubleshooting return fuel pressure, often necessary when diagnosing CP4 pump failures. When installed in the return fuel system, it allows for a pressure gauge to be...

Problem: If you are running an aftermarket pump that is mounted external of the fuel tank, you will need to install a draw straw or drill your fuel tank to accommodate a sump. Each of these has some pretty significant drawbacks including the ?...

Problem: If you are running an aftermarket pump that is mounted external of the fuel tank, you will need to install a draw straw or drill your fuel tank to accommodate a sump. Each of these has some pretty significant drawbacks including the ?...

The PowerFlo Lift Pump is the latest OEM replacement performance lift pump from the diesel experts at Fleece Performance. The PowerFlo is the only in-tank lift pump capable of supporting up to 800 hp! Direct OEM In-Tank Replacement: The PowerFlo Lift Pump retains the...

The Fleece Performance Duramax 10mm stroker CP3 is a straight forward, no inflated numbers, CP3 upgrade proven to support 750 RWHP with the proper complimenting modifications. Not only will it support 750 RWHP, but it also eliminates the factory fuel flow restiction that begins...

The Fleece Performance CP3K is a modified Duramax LBZ CP3 designed to eliminate the factory fuel flow restriction that begins at 3,000 RPM. If you have a stock CP3 pump you are losing fuel flow and rail pressure after 3000 RPM, which correlates to...

If you're running an aftermarket positive displacement lift pump like our PowerFlo on your Duramax our fuel primer bulb sealing kit will allow you to eliminate the leak prone primer bulb from your fuel system. The sealing cap includes a 1/8 inch NPT port...