CSF 3431 Radiator
OE Quality 60-Day Returns
CSF
 1 Row Plastic Tank Aluminum Core

CSF 3431 Radiator

Brand CSF 3431
Box Height (in) 7
Box Length (in) 35
Box Weight (lbs) 12
Box Width (in) 22
Cap Included No
Core Length 27 1/2
Core Material Aluminum
Core Thickness 15/16
Core Width 16
Down Flow Or Cross Flow Type Cross Flow
Hazardous Material No
Inlet Diameter 1 3/8 Left
Inlet Length (in) 16 3/4
Inlet Width (in) 1 1/2
Outlet Diameter 1 3/8 Right
Outlet Length (in) 16 3/4
Outlet Width (in) 1 1/2
Radiator Core Row Quantity 1
Tank Material Plastic
Tech Note O.E.M. style Plastic tanks & Aluminum core.
Product line 1 Row Plastic Tank Aluminum Core
Fits Mitsubishi · 28 vehicles

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

Cross-flow radiator. Engineered for efficient cooling performance.

1-row core. A single-row layout helps keep the design compact.

Cross-references APDI 8012978, CSF 2978 and Spectra Premium CU2978 for the same application. See all 5.

$75.48Free shipping
In stock · usually ships same day before 1pm CST
Step 1 — Confirm fitment
Free return shipping if it doesn't fit when you check fitment here first.
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Step 2 — Quantity
Order total $75.48
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.
Not what you need? See all Radiator options

OE-Style Radiator for Mitsubishi Lancer and Outlander

This CSF radiator is built as an OE-style replacement with a plastic tank and aluminum core layout for direct-fit cooling service. It is engineered for the Mitsubishi Lancer and Mitsubishi Outlander applications listed below, with a cross-flow design that matches the original cooling system layout.

  • Brand: CSF
  • Part number: 3431
  • 1-row radiator construction
  • Plastic tank and aluminum core design
  • Cross-flow configuration
  • Core thickness: 15/16 in.
  • Core width: 16 in.
  • Core length: 27 1/2 in.
  • Inlet diameter: 1 3/8 in., left
  • Outlet diameter: 1 3/8 in., right
  • OE-style plastic tanks with aluminum core

Product Details

CSF 3431 is part of the brand’s 1 Row Plastic Tank Aluminum Core line, a product line focused on OE-style radiator construction for factory-style fitment and cooling performance. CSF manufactures a wide range of radiator applications and validates designs through engineering and wind-tunnel testing, with production backed by ISO/TSO-certified factories. This radiator is built for 2007-2009 Mitsubishi Outlander, 2008-2013 Mitsubishi Lancer, and 2009-2015 Mitsubishi Lancer applications where the original radiator uses a cross-flow layout with left-side inlet and right-side outlet connections.

This part cross-references APDI 8012978 and Spectra Premium CU2978 for the same application.

Common Cooling Issues It Can Address

  • Cracked or leaking radiator tanks
  • Corrosion or clogging in the original core
  • Reduced coolant flow from an aging radiator
  • Overheating caused by restricted heat transfer
  • Fitment problems from a damaged OE-style replacement

Installation Notes and Tips

Verify inlet and outlet orientation before installation: this unit uses a left inlet and right outlet layout. Confirm core dimensions, hose connection size, and cross-flow configuration against the original radiator on the vehicle before removal. For best results, inspect hoses, clamps, and coolant condition during replacement, and flush the cooling system if contamination is present.

Quality Assurance

CSF radiators are engineered to high-performance standards and built in certified manufacturing facilities. The brand states that its radiator designs are validated through laboratory wind-tunnel testing and supported by decades of global production experience.

Related reading

This part fits 28 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelSubmodelLitersCylindersPositionNotes
2015MitsubishiLancer—2.0LL4N/AOE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core
2014MitsubishiLancer—2.0LL4N/AOE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core
2013MitsubishiLancerRalliart2.0LL4N/AOE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core
2013MitsubishiLancerEvolution MR2.0LL4N/AOE Style Design; Series 10; 1 Row Plastic Tank Aluminum Core
2013MitsubishiLancerEvolution GSR2.0LL4N/AOE Style Design; Series 10; 1 Row Plastic Tank Aluminum Core
2012MitsubishiLancerEvolution MR2.0LL4N/AOE Style Design; Series 10; 1 Row Plastic Tank Aluminum Core
2012MitsubishiLancerEvolution GSR2.0LL4N/AOE Style Design; Series 10; 1 Row Plastic Tank Aluminum Core
2012MitsubishiLancerRalliart2.0LL4N/AOE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core
2011MitsubishiLancerRalliart Sportback2.0LL4N/AOE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core
2011MitsubishiLancerRalliart2.0LL4N/AOE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core
2011MitsubishiLancerEvolution MR2.0LL4N/AOE Style Design; Series 10; 1 Row Plastic Tank Aluminum Core
2011MitsubishiLancerEvolution GSR2.0LL4N/AOE Style Design; Series 10; 1 Row Plastic Tank Aluminum Core
2011MitsubishiLancerEvolution MR Touring2.0LL4N/AOE Style Design; Series 10; 1 Row Plastic Tank Aluminum Core
2010MitsubishiLancerRalliart Sportback2.0LL4N/AOE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core
2010MitsubishiLancerEvolution GSR2.0LL4N/AOE Style Design; Series 10; 1 Row Plastic Tank Aluminum Core
2010MitsubishiLancerRalliart2.0LL4N/AOE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core
2010MitsubishiLancerEvolution MR2.0LL4N/AOE Style Design; Series 10; 1 Row Plastic Tank Aluminum Core
2010MitsubishiLancerEvolution MR Touring2.0LL4N/AOE Style Design; Series 10; 1 Row Plastic Tank Aluminum Core
2009MitsubishiLancerEvolution MR2.0LL4N/AOE Style Design; Series 10; 1 Row Plastic Tank Aluminum Core
2009MitsubishiLancerEvolution RS2.0LL4N/AOE Style Design; Series 10; 1 Row Plastic Tank Aluminum Core
2009MitsubishiLancerEvolution GSR2.0LL4N/AOE Style Design; Series 10; 1 Row Plastic Tank Aluminum Core
2009MitsubishiLancerRalliart2.0LL4N/AOE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core
2009MitsubishiOutlander—3.0LV6N/AOE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core
2008MitsubishiLancerEvolution MR2.0LL4N/AOE Style Design; Series 10; 1 Row Plastic Tank Aluminum Core
2008MitsubishiLancerEvolution GSR2.0LL4N/AOE Style Design; Series 10; 1 Row Plastic Tank Aluminum Core
2008MitsubishiOutlander—2.4LL4N/AOE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core
2008MitsubishiOutlander—3.0LV6N/AOE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core
2007MitsubishiOutlander—3.0LV6N/AOE style design ensures optimal fitment and performance.; 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 — 8012978CSF — 2978Spectra Premium — CU29781350A050MI3010214