Mishimoto 08+ Subaru WRX/STi X-LINE (Thicker Core) Aluminum Radiator

SKU: MISMMRAD-STI-08X

Radiators

MM Radiators - Alum X-Line

Mishimoto

Mishimoto 08+ Subaru WRX/STi X-LINE (Thicker Core) Aluminum Radiator

SKU: MISMMRAD-STI-08X

Radiators

MM Radiators - Alum X-Line

Sale ends in Calculating... Wed 14 Oct, 1:18 am AEST

IN STOCK! Est Ship 3-5 days. This item is IN STOCK at one of our warehouses or distribution centres, the ETA is the approximate time required to prepare your order for dispatch.

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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 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 maintain 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 point 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 to come.

Product Overview

2008-2014 Subaru Impreza WRX 2.5 Liter TY758, 2008-2014 Subaru Impreza WRX 2.5 Liter TY758, 2008-2014 Subaru Impreza WRX 2.5 Liter TY758, 2008-2014 Subaru Impreza WRX 2.5 Liter TY758, 2008-2014 Subaru Impreza WRX 2.5 Liter TY758, 2008-2014 Subaru Impreza WRX 2.5 Liter TY758, 2008-2014 Subaru Impreza WRX 2.5 Liter TY758, 2010-2014 Subaru Impreza WRX Limited 2.5 Liter TY758, 2010-2014 Subaru Impreza WRX Limited 2.5 Liter TY758, 2010-2014 Subaru Impreza WRX Limited 2.5 Liter TY758, 2010-2014 Subaru Impreza WRX Limited 2.5 Liter TY758, 2010-2014 Subaru Impreza WRX Limited 2.5 Liter TY758, 2009-2014 Subaru Impreza WRX Premium 2.5 Liter TY758, 2009-2014 Subaru Impreza WRX Premium 2.5 Liter TY758, 2009-2014 Subaru Impreza WRX Premium 2.5 Liter TY758, 2009-2014 Subaru Impreza WRX Premium 2.5 Liter TY758, 2009-2014 Subaru Impreza WRX Premium 2.5 Liter TY758, 2009-2014 Subaru Impreza WRX Premium 2.5 Liter TY758, 2008-2014 Subaru Impreza WRX STI 2.5 Liter TY856, 2008-2014 Subaru Impreza WRX STI 2.5 Liter TY856, 2008-2014 Subaru Impreza WRX STI 2.5 Liter TY856, 2008-2014 Subaru Impreza WRX STI 2.5 Liter TY856, 2008-2014 Subaru Impreza WRX STI 2.5 Liter TY856, 2008-2014 Subaru Impreza WRX STI 2.5 Liter TY856, 2008-2014 Subaru Impreza WRX STI 2.5 Liter TY856, 2011-2014 Subaru Impreza WRX STI Limited 2.5 Liter TY856, 2011-2014 Subaru Impreza WRX STI Limited 2.5 Liter TY856, 2011-2014 Subaru Impreza WRX STI Limited 2.5 Liter TY856, 2011-2014 Subaru Impreza WRX STI Limited 2.5 Liter TY856, 2010 Subaru Impreza WRX STI Special Edition 2.5 Liter TY856, 2005-2006 Subaru Legacy GT 2.5 Liter TY757, 2005-2006 Subaru Legacy GT 2.5 Liter TY757, 2005 Subaru Legacy GT Limited 2.5 Liter TY757, 2007 Subaru Legacy GT Limited 2.5 Liter TY757, 2005 Subaru Legacy GT Limited 2.5 Liter TY757, 2007 Subaru Legacy GT Limited 2.5 Liter TY757, 2008-2009 Subaru Legacy GT Limited 2.5 Liter TY758, 2008-2009 Subaru Legacy GT Limited 2.5 Liter TY758 ...See Application Guide for Additional Fitments

Features and Benefits

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.
16% thinner-than-stock tubes allow for more surface contact, increasing cooling efficiency.
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
Mishimoto Lifetime Warranty

Product Details

Alternate Part Number:	MMRADSTI08X
Description:	Subaru WRX and STI X-Line Performance Aluminum Radiator
Dimensions:	28" x 21.8" x 2.5"
Install Difficulty:	3
Material:	Aluminum
Part Number:	misMMRAD-STI-08X
SellingPoint01:	Direct fit for the 2008-2014 Subaru WRX/STI
SellingPoint02:	Premium radiator has 3-row (2-in thick) core for improved strength and reliability.
SellingPoint03:	16-percent thinner-than-stock tubes allow for more surface contact, increasing cooling efficiency.
SellingPoint04:	Greater density of rows for higher cooling capacity.
SellingPoint05:	More contact points for additional heat transfer.
SellingPoint06:	3-row design creates more air turbulence, maximizing cooling efficiency
SellingPoint07:	Includes magnetic drain plug
SellingPoint08:	Includes a high-pressure 1.3 bar
SellingPoint09:	Mishimoto radiator cap
SellingPoint10:	Mishimoto Lifetime Warranty
SellingPoint11:	N/A
SellingPoint12:	N/A
SellingPoint13:	N/A
SellingPoint14:	N/A
SellingPoint15:	N/A
Size:	28in x 21.8in x 2.5in
TechSpec Applications:	2008-2014 Subaru WRX--2008-2019 Subaru STI--2009-2013 Subaru Forester XT--2005-2009 Subaru Outback XT--2005-2009 Subaru Legacy GT
TechSpec Chassis Codes:	GE--GH
TechSpec Core Height (in):	27.09
TechSpec Core Length (in):	13.39
TechSpec Core Thickness (in):	2
TechSpec DPI:	13091/13093
TechSpec Drain Plug Thread Size:	M12 x 1.5
TechSpec Engine Codes:	EJ255--EJ257
TechSpec Fluid Capacity (gal):	N/A
TechSpec Includes:	Mishimoto Radiator--Mishimoto Radiator Cap--Overflow Nipples - 2--Magnetic Drain Plug--Mishimoto Lifetime Warranty
TechSpec Inlet (in):	1.54
TechSpec Material:	N/A
TechSpec Note:	This item is for Manual Transmission vehicles. For automatic applications, please purchase optional Mishimoto Universal Transmission Cooler Kit.----Caution:--The provided Mishimoto radiator cap should replace the stock cap located on the expansion tank. The stock cap attached to the radiator should be installed on the Mishimoto Performance Aluminum Radiator. The Mishimoto radiator cap is a two way valve, while the stock radiator cap is a single valve. Due to the difference in construction, the M
TechSpec Outlet (in):	1.54
TechSpec Overall Height (in):	28
TechSpec Overall Length (in):	21.8
TechSpec Overall Width (ins):	2.5
TechSpec Rows:	3

Application Summary

Part Type

Radiator

Data: v4.2 - Upd: 2026-10-11 01:14:08

Features

16% thinner-than-stock tubes allow for more surface contact, increasing cooling efficiency
Greater density of rows for higher cooling capacity
Premium radiator has 3-row (2 thick) core for improved strength and reliability

Specifications

Product Attributes - Brand: Mishimoto
Product Attributes - Manufacturer's Part Number: MMRAD-STI-08X
Product Attributes - Part Type: Radiators
Product Attributes - Product Line: Mishimoto Performance Radiators
Product Attributes - UPC: 748354803488
Product Attributes - Radiator Material: Aluminum
Product Attributes - Radiator Style: Downflow
Product Attributes - Transmission Cooler: No
Product Attributes - Inlet Location: Center upper
Product Attributes - Outlet Location: Lower driver side
Product Attributes - Overall Width (in.): 28.00 in.
Product Attributes - Overall Height (in.): 21.80 in.
Product Attributes - Overall Thickness (in.): 2.15 in.
Product Attributes - Row Quantity: 2
Product Attributes - Radiator Finish: Natural
Product Attributes - Core Width (in.): 27.08 in.
Product Attributes - Core Height (in.): 13.39 in.
Product Attributes - Core Thickness (in.): 1.65 in.
Product Attributes - Radiator Inlet Size: 1.540 in.
Product Attributes - Radiator Outlet Size: 1.540 in.
Product Attributes - Trans Cooler Adapter Fittings Included: No
Product Attributes - Fan Included: No
Product Attributes - Radiator Cap Included: Yes
Product Attributes - Quantity: Sold as a set.
Product Attributes - Notes: Includes a radiator cap, two overflow nipples, and a magnetic drain plug.

Reference Information

Brand Name/s	Mishimoto
StreetFX SKU	misMMRAD-STI-08X
SFX Item ID	4048865
Supplier Item Code	4048865
Manufacturer SKU	MMRAD-STI-08X
Manufacturer UPC	748354803488
Alternative References	mio-mmradsti08x, MIMMMRAD-STI-08X