Fleece Performance

Universal preformed 5/8" hose with 90 degree ends and T-fitting (1" ID on the T). Create clean routings and installations with this preformed cool...

Upgrade your plastic OEM or aftermarket engine coolant thermostat housing on your 6.7L Power Stroke with our more durable cast aluminum model! Our ...

The Fleece Performance replacement thermostat housing with auxiliary port is a direct replacement part for model years 1998.5-2007 RAM with 5.9L Cu...

Upgrade your factory plastic coolant reservoir with our direct replacement fabricated aluminum tank! Powder coated in gloss black, our tank is an e...

Increased Coolant Flow, Decreased Coolant Temperatures The rear cylinders on the 5.9/6.7L Cummins suffer from a lack of coolant flow, and therefore...

Increased Coolant Flow, Decreased Coolant Temperatures The rear cylinders on the 5.9/6.7L Cummins suffer from a lack of coolant flow, and therefore...

Complete kit to service your Fleece Performance Coolant Bypass - Includes all O-rings, fasteners, and a new thermostat. Two thermostats included to...

Increased Coolant Flow, Decreased Coolant Temperatures The rear cylinders on the 5.9/6.7L Cummins suffer from a lack of coolant flow, and therefore...

Increased Coolant Flow, Decreased Coolant Temperatures The rear cylinders on the 5.9/6.7L Cummins suffer from a lack of coolant flow, and therefore...

All new Fleece Performance coolant bypass for the 2019+ RAM with 6.7L Cummins! Our patent pending design seamlessly integrates with your truck for ...

The Fleece Performance coolant bypass for the 2013-2018 RAM with 6.7L Cummins seamlessly integrates with your truck for an OE fit-and-finish. Featu...

Increased Coolant Flow, Decreased Coolant Temperatures The rear cylinders on the 5.9/6.7L Cummins suffer from a lack of coolant flow, and therefore...

Increased Coolant Flow, Decreased Coolant Temperatures The rear cylinders on the 5.9/6.7L Cummins suffer from a lack of coolant flow, and therefore...

The Fleece Performance coolant bypass for the 2007.5-2012 RAM with 6.7L Cummins seamlessly integrates with your truck for an OE fit-and-finish. Fea...

Increased Coolant Flow, Decreased Coolant Temperatures The rear cylinders on the 5.9/6.7L Cummins suffer from a lack of coolant flow, and therefore...

Increased Coolant Flow, Decreased Coolant Temperatures The rear cylinders on the 5.9/6.7L Cummins suffer from a lack of coolant flow, and therefore...

Increased Coolant Flow, Decreased Coolant Temperatures The rear cylinders on the 5.9/6.7L Cummins suffer from a lack of coolant flow, and therefore...

Replacement O-ring Kit for all Fleece Cummins Coolant Bypass Kits includes 3 new square cut O-rings, 1 new standard O-ring, and 2 new AN fitting O-...

Fleece Performance 2003-2016 Cummins Coolant Bypass Brackets (Set of Two)Warranty

2013-2018 6.7L Cummins A/C Line Reroute Kit - If you are looking to do an aftermarket turbo set up like a 2nd Gen Swap Kit, or Compound Kit then th...