✅ Vehicle Fitment (Manual Transmission Only)
Designed for:
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Lexus IS300 (Manual Transmission Only)
⚠ MT models only. Not intended for automatic transmission applications.
Cooling is absolutely crucial during high performance driving. Maintained high load, high RPM instances dramatically increases heat produced by the engine requiring a lot more from the vehicle’s cooling system.
Why Upgrade from the Stock IS300 / 2JZ radiator?
Factory IS300 radiators are known for:
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Plastic end tank cracking
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Reduced cooling efficiency over time
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Heat soak under aggressive driving
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Age-related coolant leaks
An all-aluminum unit eliminates plastic weak points and improves heat transfer.
Megan Radiators are comprised completely of aluminum. From the tanks to the primary core. Aluminum tanks are a great upgrade over the plastic usually found on factory radiators which are known to crack and leak especially as they age. The larger heat exchanging core is not only more efficient at transferring heat from the coolant, but also increases total coolant carrying capacity.
Megan MR-RT-LI01 IS300 Manual Radiator Key Features
🧊 Full T-6061 Aluminum Construction
Superior durability and thermal efficiency.
🔥 High-Efficiency Core Design
Improved coolant capacity and temperature stability.
🛠 TIG-Welded End Tanks
Stronger than OEM crimped plastic designs.
⚙ Includes Radiator Cap
Complete replacement solution for MT XE10 models.
Designed to as a complete bolt-on application, Our radiators are designed to comply with factory components such as fans and A/C condensers however due to the slight increase in overall size. Upgrading to high capacity, slim radiator fans is suggested.
Color: Aluminum Silver; Finish: Natural; Type: Radiator; Style: Direct Bolt-On
Construction Design: Dual Row Internal Design, 50mm Heat Exchanger Thickness
Compatible / Replacement For 2001-2005 IS300 (XE10 1St Gen); Remark: Fit Manual Transmission ONLY
Performance Benefits
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Lower operating temperatures
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Improved cooling consistency
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Better support for boosted 2JZ builds
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Increased reliability in hot climates
If you’re turbocharging your IS300 or tracking it, cooling upgrades aren’t optional.
Improves cooling efficiency by 35 – 45% temp
Aluminum radiators mark a modern advancement in cooling. Not only does the material dissipate heat at close to double the rate compared to brass, but also reduced the overall weight of the vehicle and provides a stronger and more durable core and tube design
Megan MR-RT-LI01 IS300 Manual Radiator Installation Notes
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Manual transmission models only.
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Inspect hoses and thermostat during install.
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Properly bleed cooling system after installation.
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Use Lexus/Toyota-recommended coolant mix.
Boost responsibly. Cool aggressively.
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