Coolant Bypass Kits

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Fleece Performance 13-16 Dodge 6.7L Cummins 2nd Gen Swap Kit A/C Line Reroute Kit
Fleece Performance 13-16 Dodge 6.7L Cummins 2nd Gen Swap Kit A/C Line Reroute Kit
Low stock

Fleece Performance

Fleece Performance 13-16 Dodge 6.7L Cummins 2nd Gen Swap Kit A/C Line Reroute Kit

MPN: FPE-AC-KIT-1316
$406.98
Fleece Performance 2019+ Ram 2500/3500 Cummins 6.7L Coolant Bypass Kit
Fleece Performance 2019+ Ram 2500/3500 Cummins 6.7L Coolant Bypass Kit

Fleece Performance

Fleece Performance 2019+ Ram 2500/3500 Cummins 6.7L Coolant Bypass Kit

MPN: FPE-CLNTBYPS-CUMMINS-19
$387.59
Fleece Performance 13-18 RAM 2500/3500 6.7L Cummins Coolant Bypass Kit
Fleece Performance 13-18 RAM 2500/3500 6.7L Cummins Coolant Bypass Kit

Fleece Performance

Fleece Performance 13-18 RAM 2500/3500 6.7L Cummins Coolant Bypass Kit

MPN: FPE-CLNTBYPS-CUMMINS-1318
$387.59
Fleece Performance 98.5-07 Dodge 2500/3500 Cummins Replacement Thermostat Housing w/Aux Port
Fleece Performance 98.5-07 Dodge 2500/3500 Cummins Replacement Thermostat Housing w/Aux Port

Fleece Performance

Fleece Performance 98.5-07 Dodge 2500/3500 Cummins Replacement Thermostat Housing w/Aux Port

MPN: FPE-CUMM-TH-1318
$132.59
Fleece Performance 98.5-02 VP Coolant Bypass Kit w/ Stainless Steel Braided Line
Fleece Performance 98.5-02 VP Coolant Bypass Kit w/ Stainless Steel Braided Line
Low stock

Fleece Performance

Fleece Performance 98.5-02 VP Coolant Bypass Kit w/ Stainless Steel Braided Line

MPN: FPE-CLNTBYPS-CUMMINS-VP-SS
$366.18
Fleece Performance 98.5-02 Dodge 5.9L Cummins VP Coolant Bypass Kit
Fleece Performance 98.5-02 Dodge 5.9L Cummins VP Coolant Bypass Kit

Fleece Performance

Fleece Performance 98.5-02 Dodge 5.9L Cummins VP Coolant Bypass Kit

MPN: FPE-CLNTBYPS-CUMMINS-VP
$366.18
Fleece Performance 03-18 Cummins Coolant Bypass Service Kit
Fleece Performance 03-18 Cummins Coolant Bypass Service Kit

Fleece Performance

Fleece Performance 03-18 Cummins Coolant Bypass Service Kit

MPN: FPE-CLNTBYPS-CUMMINS-SER-KIT
$28.55
Fleece Performance 03-07 Dodge 5.9L / 04.5-12 6.7L Cummins Coolant Bypass Kit (03-07 Manual Trans)
Fleece Performance 03-07 Dodge 5.9L / 04.5-12 6.7L Cummins Coolant Bypass Kit (03-07 Manual Trans)
Low stock

Fleece Performance

Fleece Performance 03-07 Dodge 5.9L / 04.5-12 6.7L Cummins Coolant Bypass Kit (03-07 Manual Trans)

MPN: FPE-CLNTBYPS-CUMMINS-MAN
$366.18
Fleece Performance 94-98 12V Coolant Bypass Kit w/ Stainless Steel Braided Line
Fleece Performance 94-98 12V Coolant Bypass Kit w/ Stainless Steel Braided Line

Fleece Performance

Fleece Performance 94-98 12V Coolant Bypass Kit w/ Stainless Steel Braided Line

MPN: FPE-CLNTBYPS-CUMMINS-12V-SS
$366.18
Fleece Performance 94-98 Dodge 5.9L Cummins 12V Coolant Bypass Kit
Fleece Performance 94-98 Dodge 5.9L Cummins 12V Coolant Bypass Kit

Fleece Performance

Fleece Performance 94-98 Dodge 5.9L Cummins 12V Coolant Bypass Kit

MPN: FPE-CLNTBYPS-CUMMINS-12V
$366.18
Fleece Performance 07.5-12 Dodge/RAM 2500/3500 6.7L Cummins Coolant Bypass Kit
Fleece Performance 07.5-12 Dodge/RAM 2500/3500 6.7L Cummins Coolant Bypass Kit

Fleece Performance

Fleece Performance 07.5-12 Dodge/RAM 2500/3500 6.7L Cummins Coolant Bypass Kit

MPN: FPE-CLNTBYPS-CUMMINS-0712
$407.99
Fleece Performance 06-07 Auto Trans Cummins Coolant Bypass Kit w/ Stainless Steel Braided Line
Fleece Performance 06-07 Auto Trans Cummins Coolant Bypass Kit w/ Stainless Steel Braided Line

Fleece Performance

Fleece Performance 06-07 Auto Trans Cummins Coolant Bypass Kit w/ Stainless Steel Braided Line

MPN: FPE-CLNTBYPS-CUMMINS-0607-SS
$366.18
Fleece Performance 04.5-07 Dodge 5.9L Cummins Coolant Bypass Kit (06-07 Auto Trans)
Fleece Performance 04.5-07 Dodge 5.9L Cummins Coolant Bypass Kit (06-07 Auto Trans)

Fleece Performance

Fleece Performance 04.5-07 Dodge 5.9L Cummins Coolant Bypass Kit (06-07 Auto Trans)

MPN: FPE-CLNTBYPS-CUMMINS-0607
$366.18
Fleece Performance 03-05 Auto Trans Cummins Coolant Bypass Kit w/ Stainless Steel Braided Line
Fleece Performance 03-05 Auto Trans Cummins Coolant Bypass Kit w/ Stainless Steel Braided Line

Fleece Performance

Fleece Performance 03-05 Auto Trans Cummins Coolant Bypass Kit w/ Stainless Steel Braided Line

MPN: FPE-CLNTBYPS-CUMMINS-0305-SS
$366.18
Fleece Performance 03-07 Dodge 5.9L Cummins Coolant Bypass Kit (03-05 Auto Trans)
Fleece Performance 03-07 Dodge 5.9L Cummins Coolant Bypass Kit (03-05 Auto Trans)
Fleece Performance 03-07 Dodge 5.9L Cummins Coolant Bypass Kit (03-05 Auto Trans)

Fleece Performance

Fleece Performance 03-07 Dodge 5.9L Cummins Coolant Bypass Kit (03-05 Auto Trans)

MPN: FPE-CLNTBYPS-CUMMINS-0305
$366.18
Fleece Performance 94-18 Dodge 2500/3500 Cummins Replacement O-Ring Kit For Coolant Bypass Kit
Fleece Performance 94-18 Dodge 2500/3500 Cummins Replacement O-Ring Kit For Coolant Bypass Kit
Fleece Performance 94-18 Dodge 2500/3500 Cummins Replacement O-Ring Kit For Coolant Bypass Kit

Fleece Performance

Fleece Performance 94-18 Dodge 2500/3500 Cummins Replacement O-Ring Kit For Coolant Bypass Kit

MPN: FPE-CLNTBYPS-CR-ORING-KIT
$9.64
Fleece Performance Universal Pre-Formed 5/8in ID Hose w/ 90 Deg. Ends/1in ID T-Fitting
Fleece Performance Universal Pre-Formed 5/8in ID Hose w/ 90 Deg. Ends/1in ID T-Fitting
Fleece Performance Universal Pre-Formed 5/8in ID Hose w/ 90 Deg. Ends/1in ID T-Fitting
Low stock

Fleece Performance

Fleece Performance Universal Pre-Formed 5/8in ID Hose w/ 90 Deg. Ends/1in ID T-Fitting

MPN: FPE-34258-A
$32.88
Fleece Performance 13-16 Dodge 6.7L Cummins Coolant Tank Assembly
Fleece Performance 13-16 Dodge 6.7L Cummins Coolant Tank Assembly

Fleece Performance

Fleece Performance 13-16 Dodge 6.7L Cummins Coolant Tank Assembly

MPN: FPE-34235
$396.78
Wehrli Duramax Coolant Plug
3% off
Wehrli Duramax Coolant Plug
Wehrli Duramax Coolant Plug

Wehrli

Wehrli Duramax Coolant Plug

MPN: 100025
$23.28
$24.00

Coolant bypass kits are designed to improve coolant flow within an engine's cooling system.  They typically achieve this by providing an alternative path for coolant circulation, particularly around the thermostat. This can be beneficial in certain situations, such as with performance modifications that generate additional heat, or for engines prone to uneven coolant distribution.  When considering a coolant bypass kit, it's important to ensure compatibility with your specific vehicle and understand any potential impact on factory warranties.