Engines and Performance

Fleece Performance

Fleece Performance Thermostat Housing FPE-CUMM-TH-1318

The Fleece Performance replacement thermostat housing with auxiliary port is a direct replacement part for model years 1998.5-2007 RAM with 5.9L Cummins and 2013-2018 RAM with 6.7L Cummins. The auxiliary port is threaded to accept a -10AN (7/8""-14)...

Fleece Performance

Fleece Performance Service Kit FPE-FMC-FF-RLK-1724-SER

Service your 2017-2024 Fleece Performance Injector Return Repair fitting (FPE-FMC-FF-RLK-1724) with our service kit that includes new O-rings and locking ring. Kit includes 2 O-rings, 1 locking ring, and 1 locking external body.

Fleece Performance

Fleece Performance CP3 Adapter Fits 6.6L Duramax FPE-DMAX-CP3-ADPT

Replacement CP3 adapter machined from billet aluminum for the 2001-2016 GM Duramax. Includes new O-rings for the CP3 pump snout and CP3 adapter. APPLICATION NOTES Direct replacement for GM part number 97328578 and 97188692 Direct replacement for Sierra...

Fleece Performance

Fleece Performance Thermostat Housing Upgrade FPE-FMC-TH-1125

Upgrade your plastic OEM or aftermarket engine coolant thermostat housing on your 6.7L Power Stroke with our more durable cast aluminum model! Our direct replacement thermostat housing works with all factory and replacement thermostats.  New O-rings...

Fleece Performance

Fleece Performance High Pressure Injection Line Kit FPE-FL-DMAX-LBZLMM-SET

Replacement high pressure fuel lines from Fleece Performance.  These are a direct replacement for your cracked, broken, or leaking injector lines. This kit includes a complete set of 8 lines. Application Notes Replaces GM Part # 98006523 (qty 2) Replaces...

Fleece Performance

Fleece Performance Injector Return Line Repair Fitting FPE-FMC-FF-RLK-1116-5P

The plastic factory injector return fitting on the 2011-2016 6.7L Power Stroke is susceptible to breakage from heat, vibration, rough handling, and frequent disconnections for fuel filter maintenance. Upgrade this fitting and eliminate the risk of a...

Fleece Performance

Fleece Performance Injector Return Line Repair Fitting FPE-FMC-FF-RLK-1724

The plastic factory injector return connector on the 2017-2024 6.7L Power Stroke is susceptible to breakage from heat, vibration, rough handling and frequent disconnections for fuel filter maintenance. Upgrade your injector return fitting and eliminate...

Fleece Performance

Fleece Performance Coolant Bypass Service Kit FPE-CLNTBYPS-CUMMINS-SER-KIT

Complete kit to service your Fleece Performance Coolant Bypass - Includes all O-rings, fasteners, and a new thermostat. ** Two thermostats included to service all production years, you will only use one (1) of the included thermostats when replacing your...

Fleece Performance

Fleece Performance Replacement O-ring Kit FPE-CLNTBYPS-CR-ORING-KIT

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-rings. When used with MY94 - MY2002 kits, not all O-rings will be utilized.

Fleece Performance

Fleece Performance Thermostat Housing FPE-CUMM-TH-19

The Fleece Performance replacement thermostat housing with auxiliary port is a direct replacement part for model years 2019-2024 RAM with 6.7L Cummins. The auxiliary port is threaded to accept a -10AN (7/8""-14) fitting to allow you to customize your...

Fleece Performance

Fleece Performance LB7 High Pressure Injection Lines FPE-34611

2001-2004 LB7 Injection Lines complete set of 8- Over time LB7 Injection lines corrode and break, they are a leading cause of contamination when changing the Injectors. So if you are changing your injectors, or have a line failure we’ve got you covered...

Fleece Performance

Fleece Performance New Bosch CP3 for LBZ/LMM Duramax FPE-DMAX-CP3

Brand new Bosch CP3 for the 2006-2010 Duramax from Fleece Performance! Direct drop in replacement for stock injection pump Pump include a new snout O-ring APPLICATION NOTE: The fuel pressure regulator will need to be scaled appropriately when installed...