STILLEN Nissan 370Z [Z34] / Infiniti G37, Q40, Q50, Q60 Transmission Cooler Kit - 400740

The STILLEN Transmission Cooler Kit is designed to reduce automatic transmission fluid temperatures, helping protect your transmission during spirited street driving, drag racing, and high-load conditions. By increasing transmission fluid capacity and improving cooling efficiency, this kit helps prevent heat-related fluid breakdown that leads to premature transmission wear.

Vehicle Fitment:

• Nissan 370Z [Z34] RWD and AWD
• Infiniti G37 RWD and AWD
• Infiniti Q40 RWD and AWD
• Infiniti Q50 RWD and AWD
• Infiniti Q60 RWD and AWD

Key Features & Benefits:

• Increases total transmission fluid capacity
• Helps prevent automatic transmission fluid overheating
• Reduces heat-related transmission strain
• Helps extend overall transmission lifespan
• Ideal for use with STILLEN 370Z front bumper fascia
• Complete kit with all required fittings, hoses, and hardware included
• Designed for reliable street and strip performance
• Fits both RWD and AWD models

Performance Overview:

Automatic transmission performance and longevity are directly tied to operating temperature. Excessive heat causes transmission fluid viscosity breakdown, reducing lubrication effectiveness and increasing internal wear. Over time, this can lead to slipping, harsh shifting, and premature transmission failure.

The STILLEN Transmission Cooler Kit lowers operating temperatures by circulating transmission fluid through an external cooling system. This added cooling capacity helps maintain consistent fluid viscosity, improves transmission reliability, and reduces long-term mechanical stress—especially during aggressive driving, towing, or repeated hard launches.

Design & Installation Details:

This kit includes all necessary hoses, fittings, adapters, and hardware required for installation. It is engineered for a clean, reliable fit and is compatible with vehicles running the STILLEN 370Z front bumper fascia.

The system is designed as a bolt-on solution for automatic transmission-equipped vehicles, providing enhanced cooling without permanent modification to the transmission itself.

The STILLEN Transmission Cooler Kit [400740] is a smart preventative upgrade for any Nissan 370Z or Infiniti G-series owner looking to protect their automatic transmission while maintaining consistent performance under demanding conditions.