Subaru WRX and STI X-Line Performance Aluminum Radiator - MFG Part No. MMRAD-STI-08X
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MISHIMOTOPART NUMBER: 690-MMRADSTI08X

Subaru WRX and STI X-Line Performance Aluminum Radiator - MFG Part No. MMRAD-STI-08X

$40995
ShippingShips on 09/15/2026
Lowest PriceLowest Price Guarantee

Subaru WRX and STI X-Line Performance Aluminum Radiator - MFG Part No. MMRAD-STI-08X

Mishimoto 690-MMRAD-STI-08X Features:

The Mishimoto X Line performance aluminum radiator for the 2008-2014 Subaru WRX/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 2008-2014 Subaru WRX/STI radiator features a lightweight triple core, 100-percent 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. All Mishimoto radiators come with a high pressure 1.3 bar Mishimoto radiator cap and a great warranty including accident protection.Whether you’re logging miles on your daily commute or chasing lap times at the track, keeping your Subaru’s flat-four cool is key to reliability and performance. The factory radiator’s limited capacity can quickly become a bottleneck under demanding conditions, putting your engine at risk of overheating and costly damage. The Mishimoto X-Line Performance Aluminum Radiator for the 2008–2014 Subaru WRX and 2008–2021 Subaru STI is designed to be the ultimate solution, offering maximum cooling efficiency and durability for any driving environment. -- Engineered with a larger triple-row core, this r adiator delivers significantly improved heat dissipation to keep coolant temperatures in check, even under extreme loads. Its 100% brazed aluminum construction and TIG-welded polished end tanks provide superior strength and longevity compared to the stock unit, while the lightweight design helps mai ntain vehicle balance and performance. The direct OEM fit ensures an easy, no-modification installation, so you can spend less time in the garage and more time enjoying your Subaru. -- Every Mishimoto X-Line Performance Radiator includes a high-pressure 1.3 bar radiator cap to raise the boiling poin t of your coolant, offering additional protection against overheating. Additionally, a second radiator cap is included for use on the expansion tank. Backed by the Mishimoto Lifetime Warranty with accident protection, this radiator is built to keep your WRX or STI running cool and strong for years t o come.
  • Direct fit for the 2008-2014 Subaru WRX/2008-2021 Subaru STI
  • Premium radiator has 3-row (2” thick) core for improved strength and reliability
  • Mishimoto Lifetime Warranty
  • Premium radiator has 3-row (2" thick) core for improved strength and reliability.
  • 16% thinner-than-stock tubes allow for more surface contact, increasing cooling efficiency
  • 16% thinner-than-stock tubes allow for more surface contact, increasing cooling efficiency.
  • Greater density of rows for higher cooling capacity
  • Greater density of rows for higher cooling capacity.
  • More contact points for additional heat transfer.
  • 3-row design creates more air turbulence, maximizing cooling efficiency
  • Includes magnetic drain plug
  • Includes a high-pressure 1.3 bar
  • Mishimoto radiator cap
Part TypeRadiator
BrandMISHIMOTO
Package Height7.0
Package Width22.75
Package Length30.75
Weight16.56 PG
Part CategoryPerformance Parts
PositionCenter
Part FitmentSemi Universal
Vendor Part NumberMMRAD-STI-08X
Package Qty1
Package TypeEA
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