Fleece Performance

Our replacement fan extension harness for the 2017-2019 L5P Duramax allows you to repair a broken or damaged harness without needing to replace the entire fan assembly. This harness is mounted to the...

Replace your leaking transmission lines with our heavy duty, high flow, flexible transmission lines. Our kit is the most complete replacement transmission line kit available for your L5P truck! With...

The Fleece Performance L5P fuel filter upgrade kit allows you to seamlessly change over from the stock cartridge style filter to a spin-on canister style filter. The canister filter provides for...

Fleece Performance MAP Sensor Spacer with Boost Reference Port for the L5P Duramax. Problem: Because of the direct placement of the MAP sensor into the intake air stream from the factory, soot...

A common failure point on the L5P Duramax, our replacement connector with 4.5" pigtail for the fuel injectors will get you back on the road quickly. This connector is typically replaced during an...

A common failure point on the L5P Duramax, our replacement connector with 4.5" pigtail for the fuel injectors will get you back on the road quickly. This connector is typically replaced during an...

Replacement connector with 4.5" pigtail for use in multiple locations on the L5P Duramax and other GM vehicles. Replaces OEM Connector 13343443 Replaces AC Delco Connector 13384371 Application Notes...

Fleece Performance Cheetah turbochargers set the industry standard for power, quality, and reliability. Designed as a stock appearing, drop-in replacement turbocharger capable of much more! With our...

Introducing our Freedom Series cylinder heads for the 2017 - 2023 L5P 6.6L Duramax! Each cylinder head is manufactured in our state-of-the-art Freedom Racing Engine shop and is guaranteed to meet or...

Introducing our Freedom Series cylinder heads for the 2017 - 2023 L5P 6.6L Duramax! Each cylinder head is manufactured in our state-of-the-art Freedom Racing Engine shop and is guaranteed to meet or...

Fuel heater kit specifically for use in conjunction with Fleece Performance fuel filter kits installed on the 2017-2024 Ford 6.7L Powerstroke. This kit includes the fuel heater and chassis harness to...

2017-2024 Ford 6.7L Powerstroke Cab and Chassis owners - This extension harness is required in combination with part number FPE-FH-FMC-1724 when adding the optional fuel heater to the under bed...