Mishimoto X-Line Aluminum Radiator 2002-2007 WRX / 2004-2007 STI

When properly maintained, the Subaru flat-four engine is known for both its power and reliability. Keeping coolant temperatures under control is essential for extending the life of your EJ-powered WRX or STI, especially under aggressive driving or high-output turbo setups that can generate excessive heat. The Mishimoto X-Line Performance Aluminum Radiator is engineered specifically for 2001–2007 Subaru WRX and STI models and features a large three-row core and full aluminum construction for optimal cooling performance.

This radiator is built with a 100 percent brazed aluminum core and TIG-welded end tanks, providing increased durability, longevity, and coolant capacity. The three-row design maximizes surface contact for improved heat transfer, helping maintain lower engine coolant temperatures even under the most demanding conditions. The included high-pressure 1.3 bar radiator cap raises the coolant boiling point for a safer, more efficient system, and a second cap is provided for the expansion tank. A magnetic drain plug is also included to capture metal particles circulating in the coolant, offering extra protection for your engine.

Whether you need a reliable replacement radiator or a high-performance heat exchanger capable of handling track conditions, the Mishimoto X-Line Performance Aluminum Radiator is an ideal choice for your Subaru WRX or STI.

Features

• Large three-row aluminum core increases coolant capacity and improves heat transfer
• Full aluminum construction enhances cooling efficiency, durability, and pressure tolerance
• TIG-welded end tanks provide strength and long-term reliability
• Increased coolant capacity improves overall cooling performance
• Includes two 1.3 bar high-pressure radiator caps to raise coolant boiling point
• One-way radiator cap and two-way expansion tank cap maintain proper system flow
• Magnetic drain plug prevents metal fragments from circulating in the coolant

Includes:

• (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

Notes:

• This item is for Manual Transmission vehicles. For automatic applications, please purchase optional Mishimoto Universal Transmission/Power Steering Cooler
• The provided Mishimoto two-way cap (six-sided design) should replace the stock cap located on the expansion tank. The Mishimoto Performance Aluminum Radiator should utilize the included one-way cap (circular design with non-directional sticker).