Fleece Performance
Fleece Performance 12V Coolant Bypass Kit 1994-1998
MPN: FPE-CLNTBYPS-CUMMINS-12V
Increased Coolant Flow, Decreased Coolant TemperaturesThe rear cylinders on the 5.9/6.7L Cummins suffer from a lack of coolant flow, and therefore, experience the highest coolant temperatures. This can cause excessive pressure to build in the cooling system, especially the rear of the block and b…
$379
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Warranty
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View complete warrantyIncreased Coolant Flow, Decreased Coolant TemperaturesThe rear cylinders on the 5.9/6.7L Cummins suffer from a lack of coolant flow, and therefore, experience the highest coolant temperatures. This can cause excessive pressure to build in the cooling system, especially the rear of the block and blow out freeze plugs externally, or the smaller diameter plugs under the valve cover, leading to a failure.Our coolant bypass kit adds a secondary thermostat, that unlike other brands, works based on temperature instead of excessive pressure. This solves the problem before pressure becomes an issue by ensuring consistent temperatures across all six cylinders.Benefits:Lowers coolant temperature at the rear cylindersEnsures consistent temperatures across all cylindersPrevents damaging coolant pressure build upComplete kit comes with braided hose and AN O-ring fittings to ensure a leak-free installation. Kits for MY 2003+ include billet hose brackets.Why do I need a Fleece Performance Coolant Bypass?One of the biggest issues on the 5.9/6.7L Cummins is the coolant flow problem to the rear cylinders. This can cause catastrophic failure or blow outs of the freeze plugs in an over-temperature / over-pressure condition. The Fleece Performance Coolant Bypass is one of the most important additions you make to improve the reliability and longevity of the Cummins platform.Application NotesThe 2003 - 2007 5.9L automatic transmission version will eliminate the factory transmission fluid heat exchanger. The heat exchanger is designed for use in cold climates to warm the transmission fluid with the engine coolant. It is not necessary for use in warm climates or high horsepower applications, nor does it detrimentally affect the trucks performance when removed.For model years 2007 - 2018 6.7L trucks, including both automatic and manual equipped transmissions, factory installed transmission fluid heat exchangers are uncommon. For customers with a 6.7L that has a heat exchanger, a heater tube can be purchased at your local Chrysler Dealership [PN:68048997AA] to complete the installation. Warranty1 Year Limited Parts Warranty
Increased Coolant Flow, Decreased Coolant TemperaturesThe rear cylinders on the 5.9/6.7L Cummins suffer from a lack of coolant flow, and therefore, experience the highest coolant temperatures. This can cause excessive pressure to build in the cooling system, especially the rear of the block and blow out freeze plugs externally, or the smaller diameter plugs under the valve cover, leading to a failure.Our coolant bypass kit adds a secondary thermostat, that unlike other brands, works based on temperature instead of excessive pressure. This solves the problem before pressure becomes an issue by ensuring consistent temperatures across all six cylinders.Benefits:Lowers coolant temperature at the rear cylindersEnsures consistent temperatures across all cylindersPrevents damaging coolant pressure build upComplete kit comes with braided hose and AN O-ring fittings to ensure a leak-free installation. Kits for MY 2003+ include billet hose brackets.Why do I need a Fleece Performance Coolant Bypass?One of the biggest issues on the 5.9/6.7L Cummins is the coolant flow problem to the rear cylinders. This can cause catastrophic failure or blow outs of the freeze plugs in an over-temperature / over-pressure condition. The Fleece Performance Coolant Bypass is one of the most important additions you make to improve the reliability and longevity of the Cummins platform.Application NotesThe 2003 - 2007 5.9L automatic transmission version will eliminate the factory transmission fluid heat exchanger. The heat exchanger is designed for use in cold climates to warm the transmission fluid with the engine coolant. It is not necessary for use in warm climates or high horsepower applications, nor does it detrimentally affect the trucks performance when removed.For model years 2007 - 2018 6.7L trucks, including both automatic and manual equipped transmissions, factory installed transmission fluid heat exchangers are uncommon. For customers with a 6.7L that has a heat exchanger, a heater tube can be purchased at your local Chrysler Dealership [PN:68048997AA] to complete the installation. Warranty1 Year Limited Parts Warranty
Product conditions
Universal product. Review all measurements and installation requirements before ordering.
- Return eligibility
- Returnable within 30 days of confirmed delivery, in original condition, with an approved RMA
- Return window
- 30 days from confirmed delivery
- Restocking fee
- No restocking fee
- Return shipping
- Customer pays return shipping on voluntary returns
- Made to order
- No
- Backorder status
- Not backordered
- Cancellation
- Cancellation is only possible before the supplier order is submitted
- Warranty provider
- Warranty Information Pending
- Warranty duration
- Pending verification
- Compatibility
- Universal product — review all measurements
- Legal use
- Street legal
- Processing estimate
- 3–10 business days supplier processing
- Shipping
- Shipping calculated at checkout
- Signature
- No signature requirement
- Supplier
- Fleece Performance
Product compatibility is based on the vehicle and product information provided. Review your selected truck, product options, measurements, modifications, and installation requirements before ordering.