OSC 99305 Replacement HVAC Heater Core - Aluminum Construction

The OSC 99305 is a premium replacement HVAC heater core engineered to restore full cabin heating and defrost performance. Constructed entirely of aluminum — both core and tanks — this unit is designed to meet or exceed original equipment specifications for a precise drop-in fit without modifications.

OSC heater cores are built with technically advanced aluminum construction and feature cadmium-plated tubes inside and out to resist corrosion and prevent premature failure. Each unit is individually pressure-tested before leaving the factory to ensure leak-free reliability from day one.

Key Features:

• All-aluminum construction — aluminum core and aluminum tanks for durability and efficient heat transfer
• Cadmium-plated tubes — plated inside and out to prevent corrosion and premature failure
• Individually pressure tested — every unit is leak-tested before shipment
• OE drop-in fit — engineered to match original equipment form and function with no modifications required
• Includes installation accessories — all necessary foam and hardware included for a complete installation
• High-density fin count — maximizes heat dissipation and cabin warm-up efficiency

Specifications:

• Core Material: Aluminum
• Tank Material: Aluminum
• Height: 7-1/4 in.
• Width: 7-5/8 in.
• Thickness: 1 in.
• Inlet Diameter: 5/8 in.
• Outlet Diameter: 3/4 in.

Cross-Reference Part Numbers: 99305, 9-9305 (Duralast, NAPA, AutoZone, Spectra Premium, Murray Heat Transfer, OSC); 399328 (Carquest, ReadyRad, Advance Auto Parts, Vista Pro, Proliance, Thermal Solutions Manufacturing)

The OSC 99305 heater core is a reliable, cost-effective solution for restoring factory heating and windshield defrost performance. All necessary installation accessories are included for a straightforward replacement job.