ContiTech 63985 Molded Bypass Heater Hose

The ContiTech 63985 is a precision-molded heater hose designed to transfer glycol-based coolants to and from the heater core, by-pass to the radiator, as well as through other components in the vehicle's coolant system. This pre-shaped hose ensures proper routing and fitment for specific automotive applications, maintaining optimal coolant flow through tight bends while reducing stress on connections.

Key Features:

• EPDM tube and cover with synthetic knit reinforcement for superior durability
• Compatible with most coolants including ethylene glycol- and propylene glycol-based coolants, as well as organic acid modified, long-life coolants
• Meets or exceeds SAE 20R3EC Class D1 and Class D2 specifications as well as many original equipment specifications
• Resistant to Electrochemical Degradation (ECR)
• Temperature range: -40°F to 275°F (-40°C to 135°C)
• Pre-molded configuration ensures proper fit and easy installation

This replacement heater hose is engineered to match original equipment quality and fit, providing reliable coolant transfer in demanding underhood environments. Not for use in fuel or oil transfer applications.