Designed to maintain proper coolant circulation when using a heater control valve. This H-pipe bypass fitting provides a continuous flow path between the heater supply and return circuits, preventing hot spots in the right-hand cylinder bank. Commonly recommended when installing a heater shut-off valve on Ford Coyote engines, but can be used on any system requiring bypass flow.

• 5/8" hose connections
• Maintains coolant circulation when heater valve is closed
• Helps prevent localized overheating in cylinder head
• Recommended for Coyote engine swaps and custom cooling systems