Fleece Performance Coolant Bypass Kit

The Fleece Performance Coolant Bypass Kit is designed for Cummins diesel engines. It replaces the factory coolant bypass arrangement with a more durable setup. Many owners also call it a coolant bypass or a Cummins coolant bypass upgrade. The kit helps reduce the risk of the stock bypass failing. It also helps protect the engine's cooling system.

Key Features:

• Designed to address known weak points in the factory coolant bypass design on Cummins diesel engines
• Built by Fleece Performance, a diesel performance brand known for Cummins-focused upgrades
• Offered in multiple configurations for different Cummins engine generations, including stainless braided versions
• Direct-fit design intended for straightforward installation with common hand tools

This kit is a practical reliability upgrade for daily drivers, tow rigs, and performance builds. It gives you a more robust coolant routing solution and helps keep the cooling system dependable under load.