Mishimoto MMB-WRX-001 Cooling Essentials Bundle Subaru WRX 2001-2007

The Mishimoto MMB-WRX-001 Essentials Bundle is a comprehensive cooling system upgrade kit designed to replace the most failure-prone components in the Subaru WRX cooling system. This all-in-one bundle includes an aluminum radiator, performance fan shroud, silicone radiator hose kit, silicone ancillary hose kit, and a racing thermostat — everything needed to restore and enhance cooling performance in a single package.

Aluminum Radiator

The centerpiece of this bundle is Mishimoto's full aluminum radiator featuring durable TIG-welded end tanks. The aluminum construction increases coolant capacity over the stock unit, delivering superior heat dissipation and improved overall cooling efficiency.

Performance Fan Shroud

A dedicated performance fan shroud is included to maximize airflow through the radiator core, further supporting the system's thermal management under demanding conditions.

Silicone Hose Kits

Both a silicone radiator hose kit and a silicone ancillary hose kit are included. All Mishimoto silicone hoses are built from high-grade 4-ply silicone with heat-resistant embedded fibers, providing exceptional tolerance to elevated temperatures and pressures far beyond what stock rubber hoses can handle.

Racing Thermostat

The bundle also includes the Mishimoto WRX Racing Thermostat, which opens at a lower activation temperature of 154.4°F compared to the factory thermostat's 172.4°F. This earlier activation allows coolant to circulate through the engine sooner, meaningfully reducing the risk of overheating in high-heat environments and during spirited driving.

Key Features:

• Full aluminum radiator with TIG-welded end tanks for increased coolant capacity
• Performance fan shroud for optimized airflow
• 4-ply silicone radiator hose kit with heat-resistant embedded fibers
• Silicone ancillary hose kit for complete cooling circuit coverage
• Racing thermostat with 154.4°F activation temperature (vs. 172.4°F factory)
• Addresses the most common cooling system failure points in a single kit
• Backed by the Mishimoto Lifetime Warranty

The Mishimoto MMB-WRX-001 Essentials Bundle is the definitive cooling system overhaul solution for the Subaru WRX, combining proven Mishimoto components into one convenient, warranty-backed package.