Mishimoto MMTS-WRX-15 Racing Thermostat for 2015-2025 Subaru WRX FA20/FA24

Regular price: $77.95
Regular price: ~~$76.00~~
Sale price: $77.95

Shipping calculated at checkout.

In Stock: 16

Orders by 1pm PST ship same business day

Free Shipping w/3-4 Day Delivery

Authorized Dealer

Fitment Guarantee

30-Day Hassle Free Returns

Product Specification:

SKU:MISMMTS-WRX-15

MPN: MMTS-WRX-15

UPC: 748354019889

Weight: 0.26 lb

Inventory: 16

Type: Thermostats

Vehicle Fitment

2015-2021 Subaru WRX (2.0L FA20DIT)
2022-2025 Subaru WRX (2.4L FA24DIT)
2014-2018 Subaru Forester XT (2.0L FA20DIT)

Features

Direct-fit racing thermostat engineered for 2015+ Subaru WRX and compatible FA engines
Lower activation temperature (~165 °F) compared to stock (~190 °F) for earlier coolant flow
Improves coolant circulation under heavy load and spirited driving
Helps maintain lower and more consistent engine operating temperatures
Ideal upgrade for street, track, and modified builds
Precision engineered to fit factory thermostat housing without modification
Durable construction for long-term reliability
Backed by Mishimoto Lifetime Warranty

Specifications

Part Number: MMTS-WRX-15
Thermostat Activation Temperature: ~165 °F (74 °C)
OEM Activation Temperature: ~190 °F (88 °C)
Compatible Engines: 2.0L FA20DIT, 2.4L FA24DIT
Fitment Years: 2015-2025 (varies by model)
Fitment Position: Engine cooling thermostat housing (direct replacement)
Application: Racing and performance cooling improvement

Included Components

1x Racing thermostat (MMTS-WRX-15)
1x Mishimoto Lifetime Warranty documentation

Product Description

The Mishimoto MMTS-WRX-15 Racing Thermostat is designed for 2015 and newer Subaru WRX models with FA20DIT and FA24DIT engines, as well as compatible Forester XT models. Opening at ~165 °F, lower than the stock ~190 °F, it allows coolant to circulate earlier, reducing peak engine temperatures and improving thermal stability during spirited driving or performance use.

Its direct-fit design installs into the factory thermostat housing for easy installation. Suitable for both daily drivers and performance builds, the MMTS-WRX-15 enhances cooling efficiency while maintaining reliability. Mishimoto's Lifetime Warranty ensures long-term durability and performance.