2006-2007 CUMMINS COOLANT BYPASS KIT

Coolant Bypass Kit | 2006–2007 Dodge/Ram Cummins 5.9L

Protect your late 5.9L Cummins from injector cup erosion and cylinder head damage with the Fleece Performance Coolant Bypass Kit, specifically designed for 2006–2007 Dodge/Ram 2500/3500 trucks. This kit addresses the factory coolant flow restriction in the cylinder head that causes localized overheating around the injector cups — a known failure point on the final generation of the 5.9L common rail Cummins.

Why You Need a Coolant Bypass Kit

The late 5.9L Cummins (2006–2007) shares the same inherent coolant flow design flaw as earlier common rail engines. Stagnant coolant around the injector cups leads to accelerated cup erosion, allowing coolant to enter the combustion chamber and fuel system. The symptoms — white smoke, rough running, and coolant loss — often appear only after significant damage has already occurred. Installing the Fleece coolant bypass kit is the most effective preventive measure you can take to protect your engine.

Features

• Eliminates stagnant coolant flow around injector cups
• Reduces localized overheating in the cylinder head
• Extends injector cup and cylinder head gasket life
• Prevents coolant contamination of the fuel system
• Complete kit with all necessary hardware for installation
• Specifically designed for the 2006–2007 5.9L Cummins application
• From Fleece Performance — a trusted name in Cummins reliability upgrades

Fitment

• 2006–2007 Dodge Ram 2500/3500 Cummins 5.9L Common Rail

The 5.9L Cummins is one of the most capable diesel engines ever built — keep it that way. The Fleece coolant bypass kit is essential preventive maintenance for any 2006–2007 owner who wants to avoid a costly head job down the road.