STILLEN 400370BZ Underdrive Pulley Belt Set

( Brand: Stillen ), ( Manufacturer Part Number: 400370BZ ), ( Type: Engine Under Drive Pulley Kit )

Review STILLEN Infiniti Underdrive Pulley Belt Set fits 350Z FX35 G35 2007–2008

The Stillen 400370BZ is a high-performance underdrive pulley belt set engineered specifically for select Infiniti models, including the 350Z from 2007 to 2009, and the FX35 and G35 from 2007 to 2008. This belt set is an excellent upgrade for those seeking improved engine performance and durability.

The heart of this system is the underdrive pulley, which is designed to reduce the load on the crankshaft and accessory drive belts. The result is reduced engine parasitic losses, increased efficiency, and ultimately, enhanced power output and fuel economy. The pulley is made of robust materials, ensuring longevity and resistance to warping, cracking, or other damage that can occur under extreme driving conditions.

The belt set includes six heavy-duty Gates serpentine belts, ensuring a precise and secure fit. These belts are engineered to provide exceptional grip and tension retention, ensuring reliable operation of the engine's accessories. The belts are reinforced with fiber cords and feature an advanced rubber compound, allowing them to endure the high temperatures and stresses generated by the engine.

The Stillen 400370BZ underdrive pulley belt set is an excellent investment for Infiniti owners seeking to maximize the performance and longevity of their vehicles. It is designed to be an easy, direct replacement for the stock pulley and belt set, making installation a straightforward process. The set comes complete with all necessary hardware, ensuring a hassle-free installation experience.

In summary, the Stillen 400370BZ underdrive pulley belt set is a high-quality, performance-enhancing upgrade for select Infiniti models. It reduces engine parasitic losses, improves efficiency, and delivers enhanced power output and fuel economy. The set is made of durable materials and includes six heavy-duty Gates serpentine belts, ensuring reliable operation and long-lasting performance.

Pros and Cons of Buying a Stillen 400370BZ Underdrive Pulley Belt Set for 07-09 Infiniti 350Z, 07-08 Infiniti FX35, and 07-08 Infiniti G35

a. Enhanced Performance: This pulley belt set is designed to improve the overall performance of your Infiniti engine by reducing the load on the accessory drive system. This results in smoother engine operation and reduced stress on the engine components.

b. OEM-Quality Materials: The Stillen 400370BZ belt set uses high-quality materials that are designed to last longer than the OEM belts. This can save you money in the long run by reducing the need for frequent belt replacements.

c. Improved Cooling System: The underdrive pulley system helps improve the cooling system's efficiency by reducing the load on the water pump and the engine. This can help prevent overheating and extend the life of the cooling system components.

a. Higher Cost: Compared to the OEM belt set, the Stillen 400370BZ belt set is more expensive. This may be a deterrent for some buyers who are looking for a more budget-friendly option.

b. Installation Complexity: Installing an underdrive pulley system can be more complex than installing a standard belt set. It may require additional tools and expertise, which could add to the installation cost.

The Stillen 400370BZ underdrive pulley belt set offers several advantages over the OEM belt set, including improved performance, OEM-quality materials, and enhanced cooling system efficiency. However, it comes with a higher cost and installation complexity. If you prioritize improved engine performance and cooling efficiency and are willing to invest in a more expensive and complex belt set, then the Stillen 400370BZ is a good choice. Otherwise, if you are on a tight budget and prefer a more straightforward belt replacement, you may want to consider the OEM belt set instead.

If you are looking for an underdrive pulley belt set that offers improved engine performance, enhanced cooling system efficiency, and high-quality materials, the Stillen 400370BZ is a solid choice. However, make sure you are prepared for the higher cost and installation complexity that comes with it. If you have a limited budget or prefer a more straightforward belt replacement, you may want to consider the OEM belt set instead.

Details:

Gates Belt Set for STILLEN Pulleys. For Use With Part #400370. Fits 2007 2009 Infiniti FX35. Fits 2007 2009 Nissan 350Z Z33.

Manufacturer: STILLEN, Part Number: 400370BZ, condition: New: 2007 2009 Nissan 350Z / 2007 2009 Infiniti FX35, 2007 2008 G35 Underdrive Pulley Belt Set - 400370BZ. Dual Throttle Body Engines Only.

part #: 400370bz price

• $90.04

specifications bepubrac:

• for models: 350z, Fx35, G35
• for makes: Infiniti
• for years: 2007-2008
• brand: Stillen
• mpn: 400370bz
• type: Engine Under Drive Pulley Kit

shipping bepubrac:

• service: Standard
• type: Fixed
• class: Standard
• transit: 14-22 Days
• cost: $0.00

returns bepubrac:

• paid by: Seller
• time: 30 Days
• policy: Returns Accepted

seller bepubrac:

• rating: 99.6%
• city: San Leandro, California
• # reviews: 106779

general bepubrac:

• condition: New
• Car Truck Parts Accessories > Accessory Belts > Belts

offer bepubrac:

• options: Ship-to-home
• started: September 3, 2025
• availability: In Stock
• sold: 0
• quantity: 2

payments bepubrac:

• credit card: Diners-club
• other
• wallet: Apple-pay

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