Diesel Performance

All new for the 2013-2018 Dodge RAM! Control your transmission temperatures and tow with confidence with the latest improvement for your Dodge Ram from Fleece Performance.  Engineered from the ground up to provide you with the most efficient and highest performing replacement transmission cooler...

All new for the 2007.5-2009 Dodge RAM! Control your transmission temperatures and tow with confidence with the latest improvement for your Dodge Ram from Fleece Performance. Engineered from the ground up to provide you with the most efficient and highest performing replacement transmission cooler...

All new for the 2003-2007 Dodge RAM! Control your transmission temperatures and tow with confidence with the latest improvement for your Dodge Ram from Fleece Performance. Engineered from the ground up to provide you with the most efficient and highest performing replacement transmission cooler...

The Fleece Performance TapShifter allows you to shift your 2001-2005 GM Allison Transmission with the touch of a button just like the 2006 and newer trucks. Perfect for towing, drag racing, daily driving and everything in-between, the TapShifter installs in no time and provides...

The Fleece Performance TapShifter allows you to shift your 5 speed Allison Transmission with the touch of a button. Perfect for towing, drag racing, daily driving and everything in-between, the TapShifter installs in no time and provides factory-like operation, functionality and styling. Installation: The...

This black 1.5in T4 Pedestal Spacer is designed for use with T4 Turbos installed on Duramax engines when an extra inch of elevation out of the valley is required, although it could be used in any T4 application. NOTE: A T4 gasket should be...

We couldn't even leave a stack cover alone, we had to upgrade that too! Fleece Performance stack covers are made from heavy duty vinyl and come complete with a properly sized band clamp to ensure a tight fit.

We couldn't even leave a stack cover alone, we had to upgrade that too! Fleece Performance stack covers are made from heavy duty vinyl and come complete with a properly sized band clamp to ensure a tight fit.

We couldn't even leave a stack cover alone, we had to upgrade that too! Fleece Performance stack covers are made from heavy duty vinyl and come complete with a properly sized band clamp to ensure a tight fit.

We couldn't even leave a stack cover alone, we had to upgrade that too! Fleece Performance stack covers are made from heavy duty vinyl and come complete with a properly sized band clamp to ensure a tight fit.

We couldn't even leave a stack cover alone, we had to upgrade that too! Fleece Performance stack covers are made from heavy duty vinyl and come complete with a properly sized band clamp to ensure a tight fit.

We couldn't even leave a stack cover alone, we had to upgrade that too! Fleece Performance stack covers are made from heavy duty vinyl and come complete with a properly sized band clamp to ensure a tight fit.

We couldn't even leave a stack cover alone, we had to upgrade that too! Fleece Performance stack covers are made from heavy duty vinyl and come complete with a properly sized band clamp to ensure a tight fit.

We couldn't even leave a stack cover alone, we had to upgrade that too! Fleece Performance stack covers are made from heavy duty vinyl and come complete with a properly sized band clamp to ensure a tight fit.

Part Type: Plug Fittings Fitting Size: -6 AN O-ring Head Style: Internal Allen Fitting Color: Black anodized Fitting Material: Aluminum

Part Type: Plug Fittings Fitting Size: -10 AN O-ring Head Style: Internal Allen Fitting Color: Black anodized Fitting Material: Aluminum

Part Type: Plug Fittings Fitting Size: -8 AN O-ring Head Style: Internal Allen Fitting Color: Black anodized Fitting Material: Aluminum

SureFlo performance sending units are designed to work with aftermarket lift pumps and fit directly into your stock sending unit location. It features factory style quick disconnects to adapt your stock fuel lines at the tank, giving you the cleanest installation available, and requiring...

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 1/4...

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 1/4...

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 1/4...

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 1/4...

The SureFlo performance sending unit from Fleece Performance is a drop-in replacement for the1999-2007 Ford 7.3/6.0L Powerstroke trucks needing to repair a malfunctioning fuel level sender or if you are looking to run your own custom fuel lines directly to the tank. SureFlo performance...