CSF 3099 Radiator

CSF 3099 Radiator for Subaru Forester and Impreza

CSF 3099 is an OE-style radiator built with a 1-row aluminum core and plastic tanks for direct replacement cooling performance. It is engineered for the 1999-2002 Subaru Forester and 1999-2001 Subaru Impreza, with fitment matched to the factory-style layout and hose locations.

Key Features

• 1-row radiator design with aluminum core and plastic tanks
• Down-flow configuration for OE-style cooling system routing
• Core thickness: 5/8 in.
• Core width: 27 1/16 in.; core length: 13 3/8 in.
• Inlet diameter: 1 1/2 in. right; outlet diameter: 1 1/2 in. left
• Oil cooler section: 14 3/4 in. high-efficiency concentric type
• OE-style plastic tank and aluminum core construction
• Part number: 3099

Product Details

This CSF radiator is part of the 1 Row Plastic Tank Aluminum Core line, a product line focused on OE-style replacement radiators with factory-matched construction. CSF states its radiators are engineered to performance standards, validated through wind tunnel testing, and manufactured across a broad catalog of applications. For Subaru Forester and Subaru Impreza owners, CSF 3099 provides the correct down-flow layout, inlet and outlet sizing, and integrated oil cooler design needed for a direct-fit cooling system replacement.

This part cross-references APDI 8012402 and TYC 2211 for the same application. The CSF 3099 radiator is also referenced in the aftermarket under related numbers such as Spectra Premium CU2402.

What It Helps Address

• Coolant leaks from aging radiator tanks or core seams
• Overheating caused by restricted or inefficient heat transfer
• Cracked plastic tanks from heat cycling and age
• Reduced cooling efficiency in Subaru Forester and Subaru Impreza applications
• Oil cooling concerns where the factory-style concentric cooler is required

Installation Notes and Tips

Verify radiator dimensions, inlet and outlet orientation, and oil cooler configuration before installation. This radiator uses a down-flow layout with the inlet on the right and outlet on the left, so hose routing should match the original vehicle setup. Confirm the vehicle uses the OE-style mini 16 psi cap arrangement noted in fitment data; cap is not included.

Fits 1999-2002 Subaru Forester, N/A. Fits 1999-2001 Subaru Impreza, N/A.

Quality Assurance

CSF manufactures radiators in ISO/TSO-certified facilities and validates cooling performance through laboratory testing. The brand has supplied radiators worldwide for decades and maintains a large application catalog for vehicle cooling system replacement.