One Stop Solutions 2321 Radiator

OE-Style Cooling Replacement

The One Stop Solutions OSC Premium New Automotive Radiator, part number 2321, is built for 2000-2006 Toyota Tundra applications with downflow cooling layout. It uses premium-grade aluminum construction with plastic tanks and a concentric transmission oil cooler to support factory-style cooling performance.

Designed around OES form and function, this radiator focuses on direct-fit dimensions, leak control, and consistent thermal management for daily driving and high-mileage use.

Key Features

• Fits 2000-2006 Toyota Tundra, N/A
• Downflow radiator design with 1-row core construction
• Core dimensions: 22 5/8 in. height, 27 1/2 in. width, 1-1/4 in. thickness
• Premium-grade aluminum core with plastic tanks
• Concentric transmission oil cooler included
• Die-cut gasket design for leak resistance
• Individually pressure tested during production
• Factory-style fitment with matched header and outlet dimensions

Detailed Description

This OSC radiator, part number 2321, is engineered as a direct replacement for the factory cooling assembly on the Toyota Tundra. It uses aluminum tubes and fins with plastic tanks, plus a concentric transmission oil cooler, to maintain OE-style cooling performance while addressing common wear points found in original radiators. The design includes cadmium-plated tubes inside and out, and the unit is assembled to factory specifications for fit and sealing.

For Toyota Tundra owners needing a radiator replacement for 2000-2006 models, this unit is built around the original downflow configuration and includes the transmission cooler arrangement used in the application. The radiator is pressure tested during production and built with enhanced fin density and core design improvements to support longer service life in higher-mileage vehicles. This part cross-references Spectra Premium CU2321 and Koyorad A2321 for the same application.

Common Problems This Radiator Can Address

• Coolant leaks from a cracked or aging radiator tank
• Overheating caused by restricted or weakened core flow
• Transmission fluid temperature concerns related to a failing cooler circuit
• Reduced cooling efficiency from corrosion or internal wear
• Fitment issues after replacing a damaged factory radiator

Installation Notes and Tips

Verify core dimensions, inlet and outlet sizes, and transmission cooler connection spacing before installation. This radiator is built for 2000-2006 Toyota Tundra, N/A applications and follows the original downflow layout, so it should be matched to the vehicle’s existing cooling configuration. Inspect hoses, clamps, and mounting points for wear before transferring the new radiator into place.

Because the unit is pressure tested and assembled to factory specifications, installation should focus on clean sealing surfaces and correct line routing for the transmission cooler connections. Confirm that the cooling system is properly filled and bled after installation.

Quality Assurance

OSC radiators are produced with premium materials and undergo multiple pressure tests during manufacturing: the cooler circuits are tested before tank installation, the core is tested before assembly, and the completed radiator is tested again. Part number 2321 is built to OES form and function standards for consistent replacement quality.