STILLEN Nissan 370Z / Infiniti G37, Q40, Q50, Q60 Underdrive Pulley Belt Set - 400370B

The STILLEN Underdrive Pulley Belt Set is specifically engineered for vehicles equipped with the STILLEN Underdrive Performance Lightweight Crank Pulley part number 400370. When installing an underdrive crank pulley, the factory-length serpentine belt is no longer suitable due to the reduced pulley diameter. This belt set ensures proper fitment, belt tension, and accessory operation.

This set includes a high-quality Gates serpentine belt, selected by STILLEN to meet exact length and durability requirements for underdrive pulley applications. Using the correct belt is critical to maintaining proper accessory function, preventing belt slip, and ensuring long-term reliability.

Designed for both rear-wheel-drive and all-wheel-drive configurations, this belt set provides a direct, no-guesswork solution when upgrading to a STILLEN underdrive crank pulley. It is a required component to complete the installation properly and safely.

Fitment:

• Nissan 370Z
• Infiniti G37
• Infiniti Q40
• Infiniti Q50
• Infiniti Q60
• Fits RWD and AWD models
• Required for use with STILLEN Underdrive Crank Pulley part number 400370

Key Features:

• Gates serpentine belt set
• Engineered specifically for STILLEN underdrive pulleys
• Correct length for reduced-diameter crank pulley
• Ensures proper belt tension and accessory operation
• Required for underdrive pulley installation
• Direct replacement solution

Installation Notes:

• Designed exclusively for use with STILLEN underdrive crank pulley 400370
• Factory belt will not fit underdrive pulley applications

Technical Details:

• Belt Manufacturer: Gates
• Application: Underdrive crank pulley systems
• Part Number: 400370B
• Manufacturer: STILLEN