OSC HD9121 Heavy-Duty Radiator with Transmission and Engine Oil Coolers

The OSC HD9121 is a heavy-duty radiator engineered to meet or exceed Original Equipment (OE) specifications for commercial trucks and medium-duty vehicles. Designed specifically for demanding applications, this radiator provides reliable cooling performance for vehicles operating under extreme conditions or high mileage.

Key Features:

• 31 7/16-inch overall height for proper fitment
• Single row (1-row) core design for efficient heat transfer
• Integrated transmission oil cooler for automatic transmission cooling
• Built-in engine oil cooler for enhanced lubrication system protection
• 3/4-inch NPT fittings for secure connections
• Drop-in fit, form, and function for easy installation
• Undergoes rigorous testing including cycle, vibration, burst, and environmental testing
• ISO TS16949 certified manufacturing with 100% leak testing

OSC Heavy-Duty radiators feature innovative design enhancements that address original equipment failures and extend service life in high-mileage applications. Many models incorporate welded double header designs to reduce flexing, and superior stainless steel coolers that replace OE aluminum components for improved durability. This radiator is ideal for fleet operators and commercial vehicle owners seeking OE-quality replacement parts with enhanced reliability.