Mishimoto 2001-2007 Subaru WRX and STi Manual Aluminum Radiator

This Mishimoto performance aluminum radiator is a direct-fit upgrade for 2002-2007 Saab/Subaru applications covering 9-2X Aero, Impreza WRX, Impreza WRX STI, Impreza WRX TR. It replaces the weak points of the stock part with stronger materials and better flow or cooling so heat, boost and abuse stay under control on street and track duty. AutoTalent lists verified US-market fitment in the table below.

Why upgrade

Whether you daily drive a stock STI or rallycross a modified WRX, an efficient cooling system is key to extending the life of your flat-four. The plastic end tanks of the stock radiator are especially prone to cracking from years of constant variation in temperature. Mishimoto engineers these kits around real chassis packaging, so hoses, coolers and adapters line up without fabrication on the listed years. Follow the published torque specs and install guide, reuse sensors where instructed, and confirm clearances if you run other supporting mods. Every unit ships with the Mishimoto Lifetime Warranty for as long as you own it.

Features

• Full aluminum construction provides increased heat and pressure tolerance, improved heat dissipation, increased durability, and improved cooling efficiency
• Manufactured with robust TIG-welded end tanks for improved strength and extended longevity
• 100% brazed aluminum core for maximum reliability
• Increased coolant capacity directly results in improved cooling efficiency
• Now includes two 1.3 bar high-pressure caps, raising the boiling point of engine coolant to provide a safer, more efficient system
• Two-way expansion tank cap and one-way radiator cap ensure proper flow and function of cooling system to avoid overheating
• Designed to original equipment specifications for the 2001-2007 WRX and STI

What's Included

• Mishimoto Radiator
• Mishimoto Radiator Cap
• 1/16-inch NPT Plug
• Fan Mounting Hardware
• Magnetic Drain Plug
• Mishimoto Lifetime Warranty

Specifications

Fitment Notes

Verified against Mishimoto US applications and dealer listing for 2002-2007 (4 rows). Years extended to 2027 where the US model remains in production.

Vehicle Fitment