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Mishimoto X-Line Aluminum Radiator 2008-2014 WRX / 2008-2021 STI

Save $138.36 Save $138.36
Original price $560.31
Original price $560.31 - Original price $560.31
Original price $560.31
Current price $421.95
$421.95 - $421.95
Current price $421.95

The Mishimoto X Line performance aluminum radiator for the 08+ Subaru WRX and STI is designed with a larger 3 row core to maximize cooling efficiency, boost engine functions, and most importantly protect your car from overheating. It is the ideal upgrade to the stock Subaru radiator whether you drive your vehicle daily or take it for track runs. The Mishimoto aluminum WRX and STI radiator features a lightweight triple core, 100% brazed aluminum, and polished end tanks, enhancing the overall performance of your engine. Every Mishimoto aluminum radiator is a direct OEM fit making installation effortless with no cutting or modification required.

This item is for Manual Transmission vehicles. For automatic applications, please purchase optional Mishimoto transmission cooler (P/N: MMTC-U)

Customer Reviews

Based on 5 reviews
Everything at once

Since everything on the front was coming off. I did the timing belt kit with water pump from gates racing. The kit was great and had good instructions. Oil pump from IAG it was top notch as expected from them and larger radiator from Mishimoto it’s huge compared to the factory one and it mounted up perfectly along with new hoses and belts.


Thank you for your review! We are happy to hear that you were able to upgrade multiple components at once, including the Mishimoto X-Line Aluminum Radiator! We always strive to provide top-notch products! Happy driving!


Definitely keeps my sti cooler then stock

Looks good in the car and keeps my sti cooler then stock . A must buy


Thank you for sharing your positive experience with the Mishimoto X-Line Aluminum Radiator for your STI! We are glad to hear that it not only looks great in your car, but also helps keep it running cooler than the stock radiator! This is definitely a number 1 upgrade to the WRX/STI! Thank you for your 5 Star Review and added pic!


Chills my car and i love it

I was running a stick size radiator and it was cooking the car. Now with the X-line radiator and thermostat it hangs around 167 and may even get colder... my daily driver is running strong. Shout out to Subimods for the quick delivery


The X-Line Aluminum Radiator by Mishimoto is a phenomenal upgrade from OEM! It has a larger triple core that is lightweight and designed to cool more efficiently! There are no plastic parts on this piece and it is a drop in part! Thank you for the 5 Stars!



I have a full STI swapped Forester, and I have yet to replace the oem radiator. It was shipped out and delivered quickly. Mishimoto is a great choice, I’m very pleased knowing that I am keeping my build safe- I don’t need any blown head gaskets!


Mishimoto makes phenomenal cooling products and their X-Line Aluminum Radiator is the perfect upgrade from OEM. The larger 3 core design improves cooling for maximum efficiency! Thank you for the 5 Star Review!


Christian Graham
No Teflon tape with kit

I’m a mechanic. And know how to put a radiator in, but the port you have to our in that goes to the upper coolant resevoir doesn’t come with any Teflon tape, and I inspected the parts and they looked like that were machine in a way they looked flared and would seal that way, please inlcude some kind of flyer or even some Teflon tape for that fitting for such a nice product, ya gotta go the extra mile and make sure it’s as bolt on as bolt on gets. Luckily I noticed the seep right away and looked at the instruction but not everyone will (like myself) and it will cause leaks and blown motors and people will be mad at you cuz your radiator leaked and drained the coolant.


Thank you for your positive review of the Mishimoto X-Line Aluminum Radiator. This is a fantastic radiator to increase cooling and with the full aluminum construction is more durable than OEM. Your suggestion is dully noted and will be relayed to the manufacturer. Enjoy your added protection.


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