Fleece Performance

FPE-CLNTBYPS-CUMMINS-0305-SS-FQWW

Cummins Coolant Bypass Kit 003-05 Auto Trans with Stainless Steel Braided Line

$369.99
Shipping calculated at checkout.
In stock
Description

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 and up 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.
Application Notes:

  • The 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.
Shipping
  • Orders are processed within 2-5 business days with the exception of pre-orders
  • You will receive your order anywhere from 5-10 business days from the date that it is shipped out, not the date the order is placed.
  • After your payment is authorized and verified, it can still take up to two business days to process your order in our warehouses.
  • Business days do not include weekends or holidays. Orders placed on Friday after 12PM EST or over the weekend will begin processing on the following Monday.

FAQ

Your Guide to Shopping with Confidence: Essential FAQs for JRB Customs Shop Customers

What products do you offer?

We specialize in a wide range of diesel truck parts, including performance upgrades and customization accessories.

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Orders can be placed directly through our website with various payment options available.

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We are committed to providing high-quality products. Each item is rigorously tested to ensure reliability and performance.

What is your return policy?

Returns are accepted under specific conditions. Please refer to our Return and Refund Policy for more information.

How can I contact customer support?

Our customer support team is available via email or phone. Contact details are provided on our website.

Do you offer technical support for product installation?

Yes, technical support is available for product installation and related inquiries.