CSF 3501 Radiator
OE Quality 60-Day Returns
CSF
 1 Row Plastic Tank Aluminum Core

CSF 3501 Radiator

Brand CSF 3501
Core Thickness 5/8
Core Width 27
Core Material Aluminum
Tank Material Plastic
Core Length 13 3/4
Inlet Diameter 1 1/8 & 1 1/16 left
Outlet Diameter 1 9/16 left
Down Flow Or Cross Flow Type Down flow
Radiator Core Row Quantity 1
Cap Included No
Box Height (in) 4 5/16
Box Length (in) 30 1/16
Box Weight (lbs) 8
Box Width (in) 21
Csf Cap Number 4514
Hazardous Material No
Inlet Length (in) 27 13/16
Inlet Width (in) 1 3/16
Oil Cooler (in) 14 3/4 (high-efficiency plate type)
Outlet Length (in) 27 13/16
Outlet Width (in) 1 3/16
Tech Note O.e.m. style plastic tanks & aluminum core.
Product line 1 Row Plastic Tank Aluminum Core
Fits Subaru · 10 vehicles

OE-style construction. Plastic tanks and an aluminum core match the original design.

Down-flow design. Promotes efficient coolant flow for consistent heat transfer.

High-performance testing. Wind-tunnel validation helps confirm cooling performance.

Cross-references APDI 8013281, Bosch 13281 and Spectra Premium CU13281 for the same application. See all 5.

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OE-Style Cooling for Subaru Legacy and Outback

CSF 3501 is a direct-fit radiator built with an aluminum core and plastic tanks in an OE-style layout. It is designed for 2010-2014 Subaru Outback and 2010-2013 Subaru Legacy applications, with a 2014 Subaru Legacy fitment also listed.

The CSF 3501 radiator uses a 1-row, down-flow design with a 5/8-inch core thickness and a high-efficiency plate-type oil cooler. For Subaru Legacy and Subaru Outback owners looking for a replacement radiator that follows factory-style construction, this unit is built around the original cooling system layout.

Key Features

  • OE-style plastic tank and aluminum core construction
  • 1-row down-flow radiator design
  • 5/8-inch core thickness
  • 27-inch core width and 13 3/4-inch core length
  • High-efficiency plate-type oil cooler built into the radiator
  • Left-side inlet and outlet configuration
  • Designed for Subaru Legacy and Subaru Outback fitment

Product Details

CSF 3501 is part of CSF’s 1 Row Plastic Tank Aluminum Core line, a product line focused on OE-style radiator replacement construction. CSF manufactures radiators for a wide range of vehicle applications and validates cooling performance through engineering and wind-tunnel testing. This radiator follows the factory-style plastic tank and aluminum core format, making it a practical replacement for Subaru cooling system service on the Legacy and Outback platform.

This part cross-references APDI 8013281 and Spectra Premium CU13281 for the same application. The CSF 3501 part number is also useful when searching for a Subaru Legacy radiator replacement or a Subaru Outback radiator replacement by year and engine-cooling configuration.

What This Radiator Helps Address

  • Coolant leaks from aging plastic tanks
  • Restricted cooling performance from a worn radiator core
  • Overheating caused by internal radiator deterioration
  • Transmission or fluid temperature control concerns tied to the integrated oil cooler
  • Factory-style radiator replacement needs on Subaru Legacy and Subaru Outback models

Installation Notes

Compatible With 2014 Subaru Legacy, N/A; 2010-2014 Subaru Outback, N/A; and 2010-2013 Subaru Legacy, N/A. OE-style design notes specify use of a Micro, 16 psi cap for listed Outback and Legacy applications. Verify inlet and outlet orientation, core dimensions, and cooler connections against the original radiator before installation. The cap is not included.

Quality Assurance

CSF states that its factories are ISO/TSO certified and that its radiators are engineered to high-performance standards. The brand also notes long-term global production experience and performance validation testing for cooling efficiency.

Related reading

This part fits 10 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
2014SubaruLegacy3.6LH6N/A1 Row Plastic Tank Aluminum Core
2014SubaruOutback3.6LH6N/AOE Style Design; Use Micro, 16 psi Cap; 1 Row Plastic Tank Aluminum Core
2013SubaruLegacy3.6LH6N/AOE Style Design; Use Micro, 16 psi Cap; 1 Row Plastic Tank Aluminum Core
2013SubaruOutback3.6LH6N/AOE Style Design; Use Micro, 16 psi Cap; 1 Row Plastic Tank Aluminum Core
2012SubaruLegacy3.6LH6N/AOE Style Design; Use Micro, 16 psi Cap; 1 Row Plastic Tank Aluminum Core
2012SubaruOutback3.6LH6N/AOE Style Design; Use Micro, 16 psi Cap; 1 Row Plastic Tank Aluminum Core
2011SubaruLegacy3.6LH6N/AOE Style Design; Use Micro, 16 psi Cap; 1 Row Plastic Tank Aluminum Core
2011SubaruOutback3.6LH6N/AOE Style Design; Use Micro, 16 psi Cap; 1 Row Plastic Tank Aluminum Core
2010SubaruLegacy3.6LH6N/AOE Style Design; Use Micro, 16 psi Cap; 1 Row Plastic Tank Aluminum Core
2010SubaruOutback3.6LH6N/AOE Style Design; Use Micro, 16 psi Cap; 1 Row Plastic Tank Aluminum Core
Directly replaces or cross-references 5 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
APDI — 8013281Bosch — 13281Spectra Premium — CU1328145111 AJ05ASU3010665