Best selling products

Introducing our Freedom Series cylinder heads. Each cylinder head is manufactured in our state-of-the-art cylinder head machine shop and guarante...

DESCRIPTION Upgrade your Cummins valve springs and retainers with our Fleece Performance spring and retainer kit. Our springs are manufactured fr...

DESCRIPTION Upgraded 3/8” diameter pushrods for Cummins 24V diesel engines. Produced from 4130 chrome molybdenum steel and heat treated to Rockwe...

DESCRIPTION Fleece Performance Billet Rocker Arm Bridges for 1998.5 + 24v 5.9L/6.7L Cummins (set of 12).  FEATURES These bridges offer a massive...

DESCRIPTION Trust Fleece Performance to bring you the best OE alternative parts you need! Our replacement rocker armassembly fits 1998.5-2018 Dod...

DESCRIPTION Auxiliary fuel filter and line kit for your 1998.5-2002 Dodge Cummins.  The kit includes everything you need to properly route, plum...

DESCRIPTION Only from Fleece, a complete fuel supply upgrade kit for your 1998.5-2002 Dodge Cummins.  The kit includes everything you need to prope...

DESCRIPTION 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 d...

DESCRIPTION The rear cylinders on the 5.9/6.7L Cummins suffer from a lack of coolant flow, and therefore, experience the highest coolant temperatur...

DESCRIPTION The Fleece Performance replacement thermostat housing with auxiliary port is a direct replacement part for model years 1998.5-2007 RA...

DESCRIPTION Introducing our Freedom Series cylinder heads. Each cylinder head is manufactured in our state-of-the-art cylinder head machine shop ...

DESCRIPTION Introducing our Freedom Series cylinder heads. Each cylinder head is manufactured in our state-of-the-art cylinder head machine shop ...

DESCRIPTION The rear cylinders on the 5.9 & 6.7L Cummins suffer from a lack of coolant flow, and therefore, experience the highest coolan...

DESCRIPTION A complete fuel upgrade for your Cummins by Fleece; this PowerFlo Lift Pump is the latest OEM replacement pump that requires no modifi...

DESCRIPTION This performance sending unit is an ideal alternative for trucks that don't have an in-tank pump needing to repair a malfunctioning...

DESCRIPTION Cummins Mechanical Fuel Pump Block Off Plate Have you upgraded from your factory mechanical lift pump to an electric pump? This b...

DESCRIPTION Introducing the Fleece Freedom Series cylinder head for the 6.6L Duramax! Now with a cupless injector bore - save time and money wi...

DESCRIPTION The Mahle Lower Gasket Kit for your Duramax includes direct replacement seals and gaskets to completely reseal the bottom end of yo...

DESCRIPTION Complete Gasket set for the upper engine on your 6.6L Duramax. This kit includes all necessary seals and gaskets except headgasket ...

DESCRIPTION  Complete Gasket set for the upper engine of your 6.6L Duramax. This kit includes all necessary seals and gaskets except headgaske...

DESCRIPTION This is a direct replacement gasket for your 2001-2010 6.6L Duramax. Mahle Headgaskets are build to meet or exceed OE specification...

DESCRIPTION This is a direct replacement gasket for your 2001-2010 6.6L Duramax. Mahle Headgaskets are build to meet or exceed OE specification...

DESCRIPTION This is a direct replacement gasket for your 2001-2010 6.6L Duramax. Mahle Headgaskets are build to meet or exceed OE specification...

DESCRIPTION  This is a direct replacement gasket for your 2001-2010 6.6L Duramax. Mahle Headgaskets are build to meet or exceed OE specificati...