STILLEN 2007-2009 Nissan 350Z / 2007-2009 Infiniti FX35, 2007-2008 G35 Underdrive Pulley Belt Set - 400370BZ

The STILLEN Underdrive Pulley Belt Set (400370BZ) is designed for dual throttle body engines equipped with the STILLEN Underdrive Crank Pulley part number 400370. Installing an underdrive pulley changes the required belt length, and this set ensures proper tension, fitment, and accessory operation.

Manufactured to meet STILLEN’s high-performance standards, this belt set provides a direct-fit solution for dual throttle body VQ engines. It prevents belt slip, improper tension, and premature wear, ensuring reliable operation with your underdrive pulley system.

This belt set is essential for completing a proper installation and unlocking the full benefits of your STILLEN underdrive pulley, including increased horsepower, torque, and improved throttle response.

Fitment:

• 2007–2009 Nissan 350Z [Z33] (dual throttle body engines only)
• 2007–2009 Infiniti FX35 (dual throttle body engines only)
• 2007–2008 Infiniti G35 (dual throttle body engines only)
• Required for use with STILLEN Underdrive Crank Pulley part number 400370

Key Features:

• Dual throttle body engine pulley belt set
• Specifically for STILLEN underdrive pulley 400370
• Ensures proper belt tension and accessory operation
• Direct-fit installation
• Prevents belt slip and premature wear

Installation Notes:

• Designed exclusively for use with STILLEN underdrive crank pulley 400370
• Not compatible with standard pulleys or non-dual throttle body engines

Technical Details:

• Application: Dual throttle body underdrive pulley systems
• Compatible Pulley Part Number: 400370
• Part Number: 400370BZ
• Manufacturer: STILLEN
• Image Note: Representative image only; actual product may vary