12V Coolant Bypass Kit 1994-1998 Fleece Performance

Fitment: UNIVERSAL

SKU: FPE-CLNTBYPS-CUMMINS-12V-FQWW
$376.95
$376.95
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12V Coolant Bypass Kit 1994-1998 Fleece Performance

12V Coolant Bypass Kit 1994-1998 Fleece Performance

$376.95

12V Coolant Bypass Kit 1994-1998 Fleece Performance

$376.95

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, 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 cylinders
  • Ensures consistent temperatures across all cylinders
  • Prevents damaging coolant pressure build up
  • Complete 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 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 Coolant Bypass is one of the most important additions you make to improve the reliability and longevity of the Cummins platform. The '03-'07 5.9L automatic transmission version will eliminate the factory transmission fluid heat exchanger.

The heat exchanger is not a fluid cooler; it was 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.

All ‘07-‘13 6.7 trucks, both automatic and manual equipped transmissions, do not have a transmission fluid heat exchanger.

Product Returns

Product Return Policy

  • Returns must be packaged securely in an outer carton
  • Do not write on the product packaging itself. Write only on the outer shipping carton.
  • Packages received without a Return Authorization Number written clearly on the outer carton will be refused.
  • Returnable items must be received by SUP within 30 days of the product being received by you the customer. (determined by tracking number)
  • Returned product must be in new, re-saleable condition, with all original boxes, packaging, parts, cables, manuals, etc.
  • Upon receipt, all returns will be inspected, and, at our discretion, credit may be refused or a restocking fee of 5%-10% may be assessed.
  • Original shipping cost and shipping protection charges are non-refundable.
  • Customer is responsible for shipping costs incurred to return products.
  • Products can only be returned for a refund, store credit, or an exchange for the same item. Product cannot be exchanged for a different part number.

Some Circumstances in which credit will not be issued but not limited to:

  • Product has been installed and/or used
  • Product has been damaged from an attempt to be installed and/or used
  • Product is shipped back without original box, manual and/or parts
  • Seal on electrical parts is broken
  • Product serial number does not match that of which was original shipped to buyer
  • Product is deemed not resell able by SUP due to customers own actions in dealing with the product

Core Returns

Core Return Instructions: STOP! Please read to avoid costly delays!

  • Step 1:  Verify the core will be received back within 30 days. (See Deadline)
  • Step 2: Fill out the Return Form.
  • Step 3: Wait for return instructions. SUP will email a return number (RMA) and a return shipping address. Many cores will be sent directly back to the manufacturer, so please read the instructions.
  • Step 4: Package the core. Good packaging prevents costly damage and/or the core being refused by the shipping carrier. It may be possible to reuse the box your original product came in. If not, use a box strong enough to support the product. Seal the product in a plastic bag to prevent leaks. Cushion the product with packing material and securely seal the package with tape.
  • Step 5: Attach the shipping label you have purchased (see return shipping policy) and write the return number (RMA) large and clear on the outside of the box.
  • Step 6: Ship the core.

Core Return Policy *** Important Please Read ***

Deadline: Core returns will only be accepted within 30 days of receiving the original product. After 30 days core credit refunds will be at the discretion of SUP.

Refund Policy: Returns made between 0-30 days are eligible for credit back to the original payment method used for the purchase. Credit may be full, partial, or denied based on the acceptance policy below. Please allow up to 4 weeks after the core is received for inspection and refund if accepted.

Return Shipping Policy: Core return shipping is the responsibility of the customer. SUP recommends using a carrier that provides package tracking and insurance. You will not be reimbursed for shipping costs incurred in shipping the core. SUP is not responsible for cores received damaged, freight penalties, and/or lost shipments.

Acceptance Policy:

 

  • No leaking fluids, all fluids must be drained, and the core must be sealed in a plastic bag. 
  • The core returned must be a like-for-like make, model, type, and part number.
  • Cores will not be accepted from a salvage or junkyard.
  • Cores must not be disassembled or have missing and/or damaged major components. 
  • Cores must be in rebuildable condition.

Core refund acceptance is at the discretion of SUP and the manufacturer/remanufacture or the original product. Failure to follow the above policy may result in partial credit and/or no credit being issued. If you would like a core returned that has been denied acceptance, you may request that within 30 days and pay for return shipping. Cores that have not been accepted and are unclaimed by the customer after 30 day will be destroyed and disposed of.

Updated 08/22/2024

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