Mishimoto MMRAD-STI-08 Aluminum Radiator for 2008-2021 Subaru WRX/STI EJ25

Vehicle Fitment

• 2008-2014 Subaru WRX (All Trims, FWD/AWD) with 2.5L EJ255 - Manual Transmission
• 2008-2021 Subaru WRX STI (All Trims, AWD) with 2.5L EJ257 - Manual Transmission

Features

• Direct-fit performance aluminum radiator designed to upgrade Subaru WRX/STI cooling systems
• Full TIG-welded aluminum end tanks and brazed core for durability and long life
• Two-row, ~1.65" thick brazed aluminum core increases coolant capacity and heat dissipation
• Dual radiator cap setup (1.3 bar radiator cap and expansion cap) for proper pressure control
• Includes magnetic drain plug to capture metallic debris and protect engine cooling system
• Improves thermal performance for street, track, rally, and autocross use
• Designed for direct OEM mounting - no cutting or modification required
• Backed by Mishimoto Lifetime Warranty for long-term confidence

Specifications

• Material: 100 % brazed aluminum
• Core Rows: 2
• Core Height: ~13.39"
• Core Length: ~27.08"
• Core Thickness: ~1.65"
• Overall Height: ~21.8"
• Overall Length: ~28"
• Overall Width: ~2.15"
• Fluid Capacity: ~2.21 gal
• Inlet/Outlet Size: ~1.54"
• Drain Plug Thread Size: M12 x 1.5
• Transmission Cooler: Not integrated - use optional universal cooler for CVT/automatic

Included Components

• 1x Mishimoto MMRAD-STI-08 performance aluminum radiator
• 1x High-pressure 1.3 bar radiator cap
• 1x Expansion tank radiator cap
• 1x Magnetic drain plug
• 2x Coolant overflow nipples
• Fan mounting hardware
• Mishimoto Lifetime Warranty documentation

Product Description

The Mishimoto MMRAD-STI-08 performance aluminum radiator is a direct-fit cooling upgrade engineered for **2008-2014 Subaru WRX and 2008-2021 Subaru WRX STI** models equipped with the 2.5L EJ25 turbo engines. Designed to replace the stock radiator, this high-quality unit features a two-row brazed aluminum core and TIG-welded end tanks that increase coolant capacity and heat dissipation over the OEM unit, helping maintain cooler engine operating temperatures under spirited driving, daily use, rally, or track conditions.

Installation is straightforward with direct OEM mounting compatibility that does not require cutting or modification. The radiator includes both a high-pressure 1.3 bar radiator cap and a separate expansion tank cap to provide proper pressure control for Subaru's dual-cap system, along with overflow nipples, magnetic drain plug, and fan mounting hardware. Backed by Mishimoto's Lifetime Warranty, the MMRAD-STI-08 is an excellent upgrade to increase cooling reliability and performance for WRX and STI enthusiasts.