One Stop Solutions 2777 Radiator

OE-Style Cooling for Subaru Applications

This One Stop Solutions radiator, part number 2777, is built for Subaru cooling system service with an OE-style downflow design and a plated transmission oil cooler. It is engineered for direct replacement use on select Subaru Forester, Impreza, Legacy, Outback, and Crosstrek applications.

For Subaru Forester radiator replacement, Subaru Impreza radiator replacement, or Subaru Legacy and Outback cooling service, part number 2777 is built around premium materials and factory-style fitment.

Key Features

• Downflow radiator design with plastic tanks and a PA core material
• Core dimensions: 27 1/16 in. wide, 13 3/8 in. high, 5/8 in. thick
• Single-row core construction for OE-style packaging
• Plated transmission oil cooler included; engine oil cooler not included
• 1 9/16 in. inlet and outlet diameters
• Die-cut gasket design helps reduce leak risk at critical joints
• Factory-spec component fit and torque application during assembly
• Pressure tested during production for cooling system integrity

Detailed Description

OSC Premium New Automotive Radiator part number 2777 is designed to match original equipment form and function for Subaru cooling systems. The radiator uses premium-grade aluminum construction with cadmium-plated tubes inside and out to help resist premature failure, while the assembly is built with fitted components and factory-spec torque values. The transmission oil cooler is plated and integrated into the unit, and the radiator is engineered for multi-fit applications without changing the installed appearance or fit.

This radiator is a direct-fit choice for 2004-2008 Subaru Forester, 2005-2009 Subaru Outback, 2005-2010 Subaru Legacy, 2008-2011 Subaru Impreza, 2009-2013 Subaru Forester, 2013-2015 Subaru XV Crosstrek, and 2016-2017 Subaru Crosstrek. It also cross-references Spectra Premium CU2777 for the same application.

Common Problems This Radiator Can Address

• Coolant leaks from a worn or damaged radiator tank or core
• Overheating caused by restricted heat transfer in the original radiator
• Transmission fluid temperature concerns tied to a failing cooler circuit
• Age-related cracking, corrosion, or fatigue in high-mileage cooling components
• Fitment issues after replacing a damaged OE-style radiator assembly

Installation Notes and Tips

Verify inlet and outlet sizing, core dimensions, and transmission cooler line spacing before installation. This unit does not include a radiator cap, and the engine oil cooler is not included. Use the existing vehicle-specific mounting and hose connections where applicable, and confirm that the cooling system is fully bled after installation to help prevent trapped air.

Quality Assurance

Each radiator is individually pressure tested during production, with the transmission and engine oil cooler circuits checked before tank installation and the completed assembly tested again after final assembly. OSC also uses engineering updates such as increased fin density and thicker core construction to address known failure points in higher-mileage Subaru applications.