Fleece Performance VP Coolant Bypass Kit with Stainless Steel Braided Line for 1998-2002 Dodge Ram 2500/3500 (5.9L / 6.7L)

Fits 1998-2002 Dodge Ram 2500 and 3500 (5.9L / 6.7L).

The rear cylinders on 5.9L and 6.7L Cummins engines often suffer from restricted coolant flow, leading to significantly higher temperatures at the back of the block. This thermal imbalance creates excessive pressure that can blow out external freeze plugs or the smaller diameter plugs located under the valve cover. The Fleece Performance VP Coolant Bypass Kit addresses this cooling deficiency at the source.

Unlike other systems that react only to excessive pressure, this kit features a secondary thermostat that operates based on coolant temperature. By opening at a set temperature, it ensures consistent flow and thermal stability across all six cylinders before pressure reaches dangerous levels. The kit includes high-quality stainless steel braided lines and AN O-ring fittings to provide a secure, leak-free connection. Manufacturer Part Number: FPE-CLNTBYPS-CUMMINS-VP-SS.

• Prevents damaging coolant pressure buildup at the rear of the engine block
• Lowers coolant temperatures at the rear cylinders for improved engine longevity
• Ensures consistent operating temperatures across the entire cylinder head
• Temperature-controlled secondary thermostat for proactive cooling management
• Complete kit includes stainless steel braided hose and AN O-ring fittings