Koyorad Racing Radiator – 2001–2005 Lexus IS300 (XE10) | Manual Transmission | 2JZ-GE

Upgrade the cooling capacity of your 2001–2005 Lexus IS300 with the Koyorad Racing Radiator — an all-aluminum high-performance radiator engineered specifically for the XE10 IS300 with manual transmission. Koyorad is a leading Japanese radiator manufacturer supplying both OEM and aftermarket applications, known for their all-aluminum racing radiators with higher core density than factory units for improved cooling capacity. A critical upgrade for IS300 builds running modified or swapped engines, track use, or any application where the factory radiator's cooling capacity is insufficient.

⚠️ Manual Transmission Fitment Only: This radiator is engineered for the IS300 with manual transmission only. The automatic transmission IS300 uses a radiator with an integrated ATF (automatic transmission fluid) cooler — a different unit. Do not install this radiator on an automatic transmission IS300. Verify your specific IS300's transmission before ordering.

Key Features

• All-Aluminum Construction – Superior Heat Dissipation: Full aluminum core and tanks deliver superior heat dissipation compared to OEM plastic tank/aluminum core radiators — aluminum-to-aluminum construction provides better thermal conductivity, improved durability, and resistance to the cracking and leaking common in OEM plastic tank radiators
• Higher Core Density – Increased Cooling Capacity: Koyorad's racing radiator core features higher tube and fin density than the factory unit — increased cooling surface area for improved heat rejection capacity. Critical for modified IS300 builds, track use, and 2JZ engine swap applications where heat management is demanding
• Manual Transmission Specific: Engineered specifically for the 2001–2005 Lexus IS300 (XE10) with manual transmission — no ATF cooler integration, correct inlet/outlet positioning and sizing for the manual transmission cooling system configuration
• 2JZ-GE Platform: Designed for the IS300's 2JZ-GE 3.0L inline-six — also a popular base for 2JZ-GTE engine swap builds where upgraded cooling is essential
• Direct OEM Fitment: Direct-fit replacement for the factory IS300 manual transmission radiator — uses OEM mounting points and hose connections for straightforward installation
• Koyorad Quality: Manufactured by Koyorad (Koyo Radiator) — a leading Japanese radiator manufacturer with decades of OEM and motorsport radiator engineering expertise

Specifications

• Type: Racing Radiator
• Construction: All-Aluminum
• Transmission: Manual Only (no ATF cooler)
• Engine: 2JZ-GE 3.0L Inline-Six
• Fitment: 2001–2005 Lexus IS300 (XE10) — Manual Transmission
• Part Number: VH010934N

Note: Manual transmission fitment only — not compatible with automatic transmission IS300. Verify your IS300's transmission before ordering. A coolant flush and refill is required after radiator installation. Professional installation recommended for proper hose routing, coolant fill, and bleed procedure.