Megan Racing MR-RT-SI04ST Radiator

✅ Vehicle Fitment

Designed for:

• Subaru WRX STI

⚠ Confirm manual transmission configuration and engine compatibility before ordering.

We are proud to introduce the new Megan Racing high performance aluminum radiator. Anytime an individual introduces their car to a racing/drifting environment, the temperature of the vehicles engine will skyrocket. One common and effective method of reducing engine temperature is to employ an aluminum radiator. This is a cost effective upgrade which can ultimately save an engine during competition or spirited driving. Often times, a temperature drop of twenty degrees or more will be noticed when using an aluminum radiator. Also included is a 1.1 bar radiator cap.

Megan Racing MR-RT-SI04ST Radiator Installation Notes

• Inspect hoses and thermostat during install.

• Properly bleed cooling system (Subarus trap air easily).

• Use Subaru-recommended coolant mixture.

• Confirm fan shroud compatibility.

Heat kills EJ reliability. Cooling keeps it honest.

Why Upgrade from Stock?

OEM STI radiators can suffer from:

• Plastic end tank cracking

• Heat soak during track sessions

• Rising coolant temps under boost

• Reduced cooling efficiency over time

An aluminum radiator increases durability and heat transfer efficiency.

This is a cost effective upgrade which can ultimately save an engine during competition or spirited driving
Often times, a temperature Drop of twenty degrees or more will be noticed when using an aluminum radiator

Key Features

🧊 Full T-6061 Aluminum Construction

Improved thermal conductivity and long-term reliability.

🔥 High-Efficiency Core Design

Greater coolant capacity for consistent cooling.

🛠 TIG-Welded End Tanks

Stronger than factory crimped plastic units.

⚙ Direct Bolt-On Fit

Engineered for factory mounting points.

One common and effective method of reducing engine temperature is to employ an aluminum radiator
Part number: MR-RT-SI04ST

Megan Racing MR-RT-SI04ST Radiator Performance Benefits

• Lower operating temperatures

• Improved consistency during track use

• Better support for tuned EJ25 builds

• Increased reliability in hot climates

If you’re turning up the boost, cooling upgrades are cheap insurance.