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

The Fleece Performance coolant bypass for the 2007.5-2012 RAM with 6.7L Cummins seamlessly integrates with your truck for an OE fit-and-finish. Features Increased Coolant Flow, Decreased Coolant Temperatures The rear cylinders on the 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. Why do I need aFleece Coolant Bypass? One of the biggest issues on the 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. Kit Includes: Rear coolant bypass thermostat housing Front coolant bypass thermostat housing New EGR cross-over tube gaskets Braided nylon coolant bypass hose with protective high temperature sleeve and AN fittings Exhaust back pressure sensor mounting block and back pressure sensor line Mounting hardware

-   Complete kit comes with braided hose and AN O-ring fittings to ensure a leak-free installation
-   Ensures consistent temperatures across all cylinders
-   Lowers coolant temperature at the rear cylinders
-   Prevents damaging coolant pressure build up

This Part Fits:

Year

Make

Model

Submodel

2007-2010

Dodge

Ram 2500

Laramie

2007-2010

Dodge

Ram 2500

SLT

2007-2010

Dodge

Ram 2500

ST

2008-2010

Dodge

Ram 2500

SXT

2010

Dodge

Ram 2500

TRX

2007-2010

Dodge

Ram 3500

Laramie

2007-2010

Dodge

Ram 3500

SLT

2007

Dodge

Ram 3500

Sport

2007-2010

Dodge

Ram 3500

ST

2008-2009

Dodge

Ram 3500

SXT

2011-2012

Ram

2500

Laramie

2011-2012

Ram

2500

Laramie Longhorn

2012

Ram

2500

Outdoorsman

2011-2012

Ram

2500

SLT

2011-2012

Ram

2500

ST

2011-2012

Ram

3500

Laramie

2011-2012

Ram

3500

Laramie Longhorn

2011-2012

Ram

3500

SLT

2011-2012

Ram

3500

ST

## Details

- **Price:** 573.99 CAD
- **Vendor:** Fleece Performance
- **Type:** Coolant Bypass Kits

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 573.99 CAD | In stock |

## Images

- Photo - Primary
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- Logo Image

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/fleece-performance-07-5-12-dodge-ram-2500-3500-6-7l-cummins-coolant-bypass-kit)
> Updated: 2026-06-27