Mishimoto Oil Cooler Kit | Multiple Subaru Fitments (MMOC-WRX-01)

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Oil Cooler Kit by Mishimoto

Whether you have a rally-inspired WRX or a built STI, maintaining ideal oil temperatures is necessary for both optimal performance and engine longevity. Treat your flat-four to a dose of reliability with the Mishimoto Subaru WRX/STI Direct-Fit Oil Cooler Kit. This kit includes precision engineered application-specific mounting brackets, premade stainless steel braided oil lines, a billet oil sandwich plate, an efficient 10-row stacked-plate Mishimoto oil cooler, and all necessary hardware. This kit provides .5 qt of additional oil capacity and reduces temperatures by more than 20°F (16°C) while providing minimal pressure loss. This kit is available with the Mishimoto standard Oil Sandwich Plate or the Mishimoto Oil Sandwich Plate with Rear-Mounted Thermostat for additional oil temperature control and optimal performance in any environment. For additional customization this kit is available with your choice of either a Sleek Silver or Stealth Black cooler. This kit is the perfect complement to the Mishimoto Subaru WRX/STI Performance Aluminum Radiator, Performance Aluminum Fan Shroud Kit, and Silicone Radiator Hose Kit for the ultimate cooling solution for your Subaru. As with all our products, this kit includes the Mishimoto Lifetime Warranty


  • Provides Dramatic Temperature Drop
  • 2 psi pressure loss
  • Thermostatic option available
  • Lifetime Warranty


  • Material: 6061 Aluminum
  • Core Height: 2.76"
  • Rows: 10
  • Cooler Construction: Stacked-plate
  • Core Thickness: 1.97"
  • Core Length: 11"
  • Fitting Size: 10AN
  • Engine Codes: EJ205, EJ255
  • Chassis Codes: GD
  • Pressure Drop: 1-2 PSI
  • Increase In Oil Capacity: 0.5 qt
  • Temp Difference: 20°F


  • 2002-2005 Subaru Impreza WRX
  • 2004-2005 Subaru Impreza STi

What's In The Box?

  • Application Specific Mounting Brackets
  • 10-Row Oil Cooler
  • 3' Stainless Steel Braided Hose w/ -10AN Fittings
  • 4' 4" Stainless Steel Braided Hose w/ -10AN Fittings
  • Oil Sandwich Plate (Thermostatic Option Available)
  • Stainless Steel Sandwich Plate Adapter, M20
  • Banjo Fitting w/ Bolt M20 x -10AN, Black
  • Black Rubber Seal
  • Mounting Hardware Set

Manual Instructions

Customer Reviews

Based on 1 review
Peter S.
Great value for more reliability

Super easy install with all the parts you need, keeps things nice and cool