Coolant Routing Upgrade Kit - 05-06 Mustang 4.6L

The Edelbrock Coolant Routing Upgrade Kit (Part No. 15804) is a precision thermostat relocation and radiator hose solution engineered specifically for 2005–2006 Ford Mustang GT models equipped with the 4.6L engine. This kit addresses thermal management challenges inherent to supercharged applications by repositioning the thermostat housing and supplying OEM-fit hoses and clamps that integrate seamlessly with the E-Force supercharger system.

Supercharging significantly increases engine heat output, and standard cooling pathways can develop hotspots or flow restrictions that reduce thermal efficiency. The Edelbrock coolant routing upgrade relocates the thermostat to a more optimal position within the cooling circuit, improving coolant flow dynamics and allowing the radiator and water pump to operate more effectively under boost. The kit includes all necessary hoses, stainless steel clamps, and hardware to ensure a factory-quality installation without modification to the engine block or radiator.

This kit is essential for Mustang owners running the Edelbrock E-Force supercharger system who want reliable coolant circulation under sustained boost conditions. Whether logging track time or aggressive street driving, proper thermal management directly impacts engine longevity, knock resistance, and tune stability. The upgrade eliminates guesswork about whether stock cooling paths can handle the added thermal load of forced induction.

Edelbrock has established itself as the engineering authority in supercharger integration for American muscle cars, and this cooling kit reflects that expertise. Designed as a matched component for the E-Force system, it ensures compatibility without fitment surprises. Installation requires basic mechanical skill and standard hand tools, making it accessible to experienced home builders while remaining cost-effective compared to aftermarket aluminum radiator upgrades.