Cooling Upgrades

Cooling Upgrades

The stock cooling system struggles under sustained track use or with forced induction. These upgrades ensure reliability.

Aluminum Radiator

• Mishimoto: Direct-fit aluminum, 30%+ more capacity
• CSF: High-quality aluminum upgrade
• Recommended for any tracked or boosted car

Oil Cooler

• Mishimoto oil cooler kit: Thermostatically controlled
• Essential for track use and forced induction
• Stock M54 oil temps can exceed 130°C on track

Electric Fan Conversion

• Replace belt-driven fan clutch with electric fans
• Frees up ~5 hp at the crank
• Better cooling control at idle and low speed
• SPAL fans commonly used

Additional Cooling

• Coolant reroute: Improves flow to hottest cylinders
• Oil thermostat upgrade: Opens earlier for better flow
• Ducting: Direct air to oil cooler and radiator