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Mishimoto X-Line Performance Aluminum Radiator, fits Subaru WRX 2008-2014/STI 2008-2021

Part # MMRAD-STI-08XSKU MISMMRAD-STI-08X

Set your vehicle above for a fit verdict. 27 vehicles listed below.

Specifications
BrandMishimoto
Part typeRadiator
PositionPrimary
Core FinishUncoated
Core Height27.09 in
Core Length13.39 in
Core MaterialAluminum
Core Row Quantity3
Core Thickness2 in
Down Flow Or Cross Flow TypeDown Flow
Drain Plug IncludedYes
Drain Plug Thread SizeM12 - 1.5
Fluid Capacity0 gal
Inlet Diameter1.54 in
Inlet LocationTop Left
Install Difficulty3
Outlet Diameter1.54 in
Outlet LocationBottom Left
Overall Height28 in
Overall Length21.8 in
Overall Width2.5 in
Radiator Cap IncludedYes
SellingPoint01Direct fit for the 2008-2014 Subaru WRX/2008-2021 STI
SellingPoint02Premium radiator has 3-row (2” thick) core for improved strength and reliability
SellingPoint0316% thinner-than-stock tubes allow for more surface contact, increasing cooling efficiency
SellingPoint04Greater density of rows for higher cooling capacity
SellingPoint05More contact points for additional heat transfer
SellingPoint063-row design creates more air turbulence, maximizing cooling efficiency
SellingPoint07Now includes two 1.3 bar high-pressure caps, raising the boiling point of engine coolant to provide a safer, more efficient system
SellingPoint08Two-way expansion tank cap and one-way radiator cap ensure proper flow and function of cooling system to avoid overheating
SellingPoint09Includes Magnetic Drain Plug to capture any metallic debris/fragments in your cooling system
SellingPoint10Mishimoto Lifetime Warranty
UPC / GTIN00748354803488
WarrantyLifetime 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
  • Greater density of rows for higher cooling capacity

Description

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 radiator delivers significantly improved heat dissipation to keep coolant temperatu res 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 maintain vehicle balance and performance. The direct OEM fit ensures an easy, no-modi fication 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 point of your coolant, offering additional protection against overheating. Additionall y, 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 to come.

Fits these vehicles 27

YearMakeModelSubmodel
2009SubaruForesterXT, XT Limited
2010SubaruForesterXT Limited, XT Sports
2011SubaruForesterXT Sports, XT Touring
2012SubaruForesterXT Limited, XT Sports, XT Touring
2013SubaruForesterXT Limited, XT Touring
2008SubaruImprezaWRX, WRX STI
2009SubaruImprezaWRX, WRX Premium, WRX STI
2010SubaruImprezaWRX, WRX GT, WRX Limited, WRX Premium, WRX SE, WRX STI, WRX STI Special Edition
2011 - 2014SubaruImprezaWRX, WRX Limited, WRX Premium, WRX STI, WRX STI Limited
2005SubaruLegacyGT, GT Limited
2006SubaruLegacyGT, GT spec.B
2007 - 2008SubaruLegacyGT, GT Limited, GT spec.B
2009SubaruLegacyGT Limited, GT spec.B
2005 - 2008SubaruOutbackXT, XT Limited
2009SubaruOutbackXT Limited
2012SubaruWRXBase, STI
2013SubaruWRXBase, Limited, STI
2014SubaruWRXBase, Limited, SE, STI
2013SubaruWRX STIBase, Sport-tech
2014SubaruWRX STIBase, Sport-tech, Tsurugi Edition
2015SubaruWRX STIBase, Launch Edition, Limited
2016SubaruWRX STIBase, Limited, Series.HyperBlue
2017SubaruWRX STIBase, Limited, Sport, Sport-tech
2018SubaruWRX STIBase, Limited, STI, Sport, Sport-tech, Type RA
2019SubaruWRX STIBase, Limited, S209, STI, Sport, Sport-tech
2020SubaruWRX STIBase, Kanrai Edition, Limited, STI, Sport, Sport-tech
2021SubaruWRX STIBase, Limited, STI, Sport, Sport-tech