Model: MMRAD-WRX-01X

Installation Specs

X-Line Performance Aluminium Radiator, fits Subaru WRX/STI 2001-2007

Name: X-Line Performance Aluminum Radiator, fits Subaru WRX/STI 2001-2007
SKU: MMRAD-WRX-01X
Price: 406.8 GBP
Availability: InStock

£406.80

(Incl. VAT)

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Installation Difficulty: Medium

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Installation Specs

Key Benefits

Three-row aluminium core provides substantial additional coolant capacity and surface contact area — built to sustain consistent temperatures even in the most demanding WRX environments.
Full aluminium construction delivers improved heat dissipation and pressure tolerance the plastic-tank factory unit cannot match under boost and heat cycling.
Two 1.3 bar high-pressure caps, two-way expansion tank cap, one-way radiator cap, and Magnetic Drain Plug included — every piece needed for a complete cooling system install.
TIG-welded aluminium end tanks replace the factory plastic components that fail under the heat cycles and pressure spikes of a turbocharged cooling system.
Three-row brazed aluminium core with increased coolant capacity directly improves cooling efficiency — more fluid volume means more thermal buffer before temps climb.
Confirmed direct fit for the WRX platform — drops in without cutting, fabricating, or adapter work, compatible with the stock cooling system configuration.
Designed for stock and modified WRX builds — handles the thermal output of stage-tuned and high-boost setups without additional modification.
Own it for life — backed by Mishimoto's Lifetime Warranty, your investment is protected long after install day.

See all benefits

Key Benefits

Three-row aluminium core provides substantial additional coolant capacity and surface contact area — built to sustain consistent temperatures even in the most demanding WRX environments.
Full aluminium construction delivers improved heat dissipation and pressure tolerance the plastic-tank factory unit cannot match under boost and heat cycling.
Two 1.3 bar high-pressure caps, two-way expansion tank cap, one-way radiator cap, and Magnetic Drain Plug included — every piece needed for a complete cooling system install.
TIG-welded aluminium end tanks replace the factory plastic components that fail under the heat cycles and pressure spikes of a turbocharged cooling system.
Three-row brazed aluminium core with increased coolant capacity directly improves cooling efficiency — more fluid volume means more thermal buffer before temps climb.
Confirmed direct fit for the WRX platform — drops in without cutting, fabricating, or adapter work, compatible with the stock cooling system configuration.
Designed for stock and modified WRX builds — handles the thermal output of stage-tuned and high-boost setups without additional modification.
Own it for life — backed by Mishimoto's Lifetime Warranty, your investment is protected long after install day.

When properly maintained, the Subaru flat-four is well known for its substantial power and impressive reliability. Proper regulation of coolant temperature is key to extending the life of your EJ-powered Subaru. Highly modified turbocharger setups and aggressive driving can result in high temperatures, which increases wear on internal engine components. The X-Line Performance Aluminium Radiator is engineered specifically for the 2001-2007 Subaru WRX and STI and features a large three-row core and full aluminium construction. This design yields optimal temperatures even in the most demanding environments.

This radiator also features a 100% brazed aluminium core with TIG-welded end tanks for increased durability, longevity, and a substantial increase in coolant capacity. The large three-row core enhances surface contact, resulting in improved efficiency, improved heat transfer, and lower engine coolant temperatures for your Subaru. The Mishimoto Subaru WRX and STI radiator includes a high-pressure 1.3 bar radiator cap, which effectively raises the boiling point of coolant to create a safer and more efficient system. Additionally, a second radiator cap is included for use on the expansion tank. Included with this radiator is a Mishimoto magnetic drain plug that removes metal fragments circulating in the coolant system, thus further protecting your engine. Whether you are looking for a reliable stock replacement radiator or a heat exchanger efficient enough for track abuse, the Mishimoto Subaru WRX and STI X-Line Performance Aluminium Radiator is an ideal choice. As with all our products, this radiator is backed by the Mishimoto Lifetime Warranty.

More Information
Overall Length (in)	17.2
Overall Height (in)	28.4
Overall Width (in)	2.5
Core Length (in)	13.54
Core Height (in)	27.24
Core Thickness (in)	2
Rows	3
Inlet (in)	1.5
Outlet (in)	1.5
Drain Plug Thread Size	M12 x 1.5
DPI	2703
Engine Codes	EJ205 EJ255 EJ257
Chassis Codes	GD
Note	This item is for Manual Transmission vehicles. For automatic applications, please purchase optional Mishimoto Universal Transmission Cooler Kit. Caution The provided Mishimoto two-way cap (six-sided design) should replace the stock cap located on the expansion tank. The Mishimoto Performance Aluminium Radiator should utilize the included one-way cap (circular design with non-directional sticker). It is the installer's responsibility to check all thermostat plugs, NPT plugs, line fittings, and other connections to assure they are fully tightened before operating the vehicle. Mishimoto recommends that you check all connections at regular intervals, especially during the first few miles after installation. For additional technical information, contact support@mishimoto.com. Due to the additional thickness of our 3-row X-Line radiator, trimming the upper hose may be necessary. For 2002-2003 Subaru WRX models built before 7/2002, remove fill neck overflow nipple and replace with 1.5875mm NPT plug provided.

MMRC-13-ONWY Install Guide

(Size: 776.1 KB)

(1) Mishimoto Radiator
(1) Mishimoto Two-Way Radiator Cap
(1) Mishimoto One-Way Radiator Cap
(1)1/16-inch NPT Plug
(1) Magnetic Drain Plug
Fan Mounting Hardware
Mishimoto Lifetime Warranty

Mishimoto Automotive (“Mishimoto”) warrants its products under this lifetime limited warranty policy (“Warranty Policy”). This Warranty Policy applies solely to: (i) Mishimoto Products purchased directly from Mishimoto or Mishimoto authorized dealers (each a “Mishimoto Product” and collectively, the “Mishimoto Products”) and (ii) the original purchaser of such Mishimoto Product (“Purchaser”). This Warranty Policy is non-transferable and all claims under this Warranty Policy must be accompanied by the original sales receipt. The terms and conditions of this Warranty Policy are subject to change by Mishimoto at any time without notice.

For our complete warranty policy, please click here.