Mishimoto Performance Aluminum Radiator X-Line Series

2015-2021 Subaru STI

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SKU: MMRAD-STI-08XWe price match!

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The X-Line Performance Aluminum Radiator will improve the cooling capacity on the Subaru STI.
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Mishimoto Performance Aluminum X-line Radiator

X-Line Specs:

  • Full aluminum construction provides increased heat and pressure tolerance, improved heat dissipation, increased durability, and improved cooling efficiency
  • 3-row core
  • Manufactured with TIG-welded end tanks for improved strength and extended service
  • 100% brazed aluminum core for maximum reliability
  • Increased coolant capacity directly results in improved cooling efficiency
  • Included 1.3 BAR radiator cap raises the boiling point of engine coolant to provide a safer and more efficient system
  • Designed to original equipment specifications
  • Designed for manual transmission models


Mishimoto Performance Aluminum Radiator X-Line

This is the end-all-be-all of radiators. This is because of the all-aluminum construction, the Mishimoto Performance X-Line Radiator is durable while improving the overall cooling efficiency of your vehicle. Mishimoto also engineered this radiator with improved heat and pressure tolerances which are the main killers of the OEM radiator. 

Over time and mileage, the pressure buildup and daily heat cycles take a toll on the OEM radiator, especially on the plastic top tank. What happens is that eventually, a hairline crack will occur on the upper tank which will cause a leak that can lead to overheating. If you're in this situation, the Mishimoto all-aluminum construction will provide your vehicle with a durable unit to provide your vehicle with long-lasting performance. 

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  1. Ehh

    By Rick A May 3, 2023

    Can’t really tell a huge difference in temps. Stock fans work way better then the Mishimoto fans by far. Should have gone with Koyo or Cobb.

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