Mishimoto X-Line Performance Aluminum Radiator For 2008-14 Subaru WRX, 08-21 WRX STI - MMRAD-STI-08X
MISMMRAD-STI-08X
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X-LINE PERFORMANCE ALUMINUM RADIATOR, FITS SUBARU WRX 2008-2014/STI 2008-2021
Purchase Includes:
- (1) Mishimoto Radiator
- (1) Mishimoto Two-Way Radiator Cap
- (1) Mishimoto One-Way Radiator Cap
- (2) Overflow Ports
- (1) Magnetic Drain Plug
- Fan Mounting Hardware
- Mishimoto Lifetime Warranty
KEY FEATURES
- Direct fit for the 2008-2014 Subaru WRX/2008-2021 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
- 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
- Includes Magnetic Drain Plug to capture any metallic debris/fragments in your cooling system
- Mishimoto Lifetime Warranty
PRODUCT DESCRIPTION
Whether youre logging miles on your daily commute or chasing lap times at the track, keeping your Subarus flat-four cool is key to reliability and performance. The factory radiators 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 20082014 Subaru WRX and 20082021 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.
Installation Instructions
Installation Instructions
Fitment
Fitment

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$409.95
So with my sti being 12 years old, I noticed the radiator had seen better days. I was doing my timing belt and removing the radiator so figured this was the time to do it. The mishimoto radiator was much bigger, and provides amazing cooling. The fit was dead on and the IAG radiator hoses were a nice addition as well. They did need some trimming though as theyre meant for stock. Overall very happy with the upgrade and Im confident summer heat in Florida will not be an issue.
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