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Mishimoto Thermostatic Oil Cooler Kit Black (Part Number: )
Mishimoto Thermostatic Oil Cooler Kit Black (Part Number: )
Mishimoto Thermostatic Oil Cooler Kit Black (Part Number: )
Mishimoto Thermostatic Oil Cooler Kit Black (Part Number: )
Mishimoto Thermostatic Oil Cooler Kit Black (Part Number: )
Mishimoto Thermostatic Oil Cooler Kit Black (Part Number: )
Mishimoto Thermostatic Oil Cooler Kit Black (Part Number: )
Mishimoto Thermostatic Oil Cooler Kit Black (Part Number: )
Mishimoto Thermostatic Oil Cooler Kit Black (Part Number: )
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Mishimoto Thermostatic Oil Cooler Kit Black (Part Number: )
Mishimoto Thermostatic Oil Cooler Kit Black
Subaru STI 2008-2014
Read 2 Reviews | 3 Q&As
msrp: $570.00

Ships within 33 days

Features & Product Details

For those of you who love to drive spiritedly or if you’re a weekend track enthusiast you may want to consider one of Mishimoto’s Thermostatic Oil Cooler Kit. This particular kit was designed to be used on the 2008-2014 Subaru STI. Please note that this oil cooler kit comes with the black cooler option.

This kit includes a large 19-row cooler that mounts inside the front bumper to provide optimal air flow and cooling efficiency. Included to help install the cooler itself are direct-fit mounting brackets and preassembled stainless steel lines with -10AN fittings that will make for an efficient, secure installation.

Once mounted, the Mishimoto Oil Cooler has been tested, and proven to reduce oil temperatures by 20 degrees F (16 degrees C) while maintaining minimal pressure loss. And for further heat protection this kit will include thermal reflective wrap for the oil lines which will protect them from nearby exhaust components. 

FITMENT NOTE: This oil cooler kit will only work with models with an un-equal length exhaust manifold, vehicles with equal an length exhaust manifold may not be compatible with this oil cooler kit.


Brand: Mishimoto
Color: Black
Core End Tank Material: Aluminum
Core Rows: 19
Core Type: Bar and Plate
Installation Hardware Included: Yes
Mfgr. Warranty: Limited Lifetime
Condition: New Product
Return Policy:

RallySport Guarantee - 30 Days

Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.

RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.

The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.
RallySport Guarantee



2 Reviews
1 out of 5 Stars
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Customer Photos and Videos
Mishimoto Thermostatic Oil Cooler Kit Black ( Part Number: MMOC-STI-08TBK)
Will not fit equal length headers!!! 1 year ago
1out of 5stars

Like the last reviewer, I ran into issues. . I had bought mine a long time ago and also wanted to bring this to everyone's attention as it may not seem obvious... This kit is for a stock STI... It will not work with equal length exhaust headers, which is what I and many track enthusiasts are running these days. I went through the installation and had to convert my kit to the WRX version. I have a solution below though, even made a YouTube video on it. 1.) Delete your OEM STI oil cooler first. Need the Mishimoto WRX oil cooler kit instead, otherwise sandwich adapter will not fit. Also, need Part #:15018AA090 and 8" of 1/2" diameter heater hose for the OEM oil cooler delete. 2.) Buy the WRX version of this kit instead. It will save you a huge headache. 3.) With the OEM STI oil cooler deleted, you will be able to easily install the WRX oil cooler kit instead. 4.) Enjoy performance on track and feel relief that the oil filter isn't touching the exhaust. I would like to see a big NOTE: THIS WILL NOT WORK WITH EQUAL LENGTH HEADERS alert in the product description.
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1 of 1 people found the following review helpful
Not a direct fit product! 2 years ago
1out of 5stars

If you have either a front mount intercooler or equel length header, this kit WILL NOT fit. The location of the cooler is poorly designed, and had to make my own mounts and fittings to mount vertically like it should have been to start. I had to reclock the sandwich plate and re route the cooler lines over the header, and replace the fittings. The reason I find this ridiculous is because I don't know who would install an oil cooler and not already have an upgraded intercooler and/or header. Mishimoto should account for cars that have modifications, not just bone stock cars. All in all I had to spend $90 on fittings, and couple hours extra to fabricate my own kit essentially. However, I can say the core, fittings, and hoses are nice quality.
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  • Q: Thermostat question  rotaxmax31 year ago

    Does the thermostat flow a small amount of oil through the cooler even before it opens so it doesn't suddenly put a lot of cold oil into the engine?
    • 0 of 0 people found the following answer helpful

      A:  On a cold start your oil will be cold regardless. This will continually cycle oil through it.

      Tyler A. @ RallySport Direct 1 year ago  
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  • Q: OEM Oil Cooler fitment  Ethan242 years ago

    Is this air to fluid cooler designed to work along with the OEM fluid to fluid sandwhich plate oil cooler on a 2012 STi?
  • Q: Inquiry  bogart3 years ago

    Hi i would like to order this mishimoto thermostatic oil cooler for my 2012 sti. My concern is that, what are the differences between this and the non thermostatic mishimoto oil cooler kit? If so, are there any advantages between the thermostatic one to the non thermostatic one. Thanks
    • 0 of 0 people found the following answer helpful

      A:  Thermostatic is better for a daily driven vehicle especially in colder climates. The thermostat opens as the vehicle warms up to help prevent against moisture build up in the oil lines.

      Nick S. @ RallySport Direct 3 years ago  
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