STILLEN Nissan Frontier, Pathfinder, Xterra / Suzuki Equator Underdrive Performance Lightweight Crank Pulley - 400385

The STILLEN Underdrive Performance Lightweight Crank Pulley is designed to improve horsepower, torque, and engine response for Nissan and Suzuki vehicles equipped with the 4.0L V6 engine. Factory crank pulleys and accessory drives consume valuable engine power simply to rotate. STILLEN reduces this loss by combining a lightweight aluminum construction with an optimized underdrive ratio.

This pulley features an underdriven design that reduces accessory drive speed by approximately 10%, lowering parasitic drag without negatively affecting accessory performance. By slowing down components such as the alternator and power steering just enough, additional horsepower and torque are freed and transferred directly to the wheels.

Constructed from lightweight aerospace-grade aluminum, this crank pulley further reduces rotational mass compared to the heavy OEM unit. Less mass means the engine can rev more freely and efficiently, resulting in improved acceleration and overall drivability. The combination of underdrive geometry and reduced weight produces noticeable gains in power while maintaining street-friendly reliability.

The end result is a measurable improvement in horsepower, torque, throttle response, and potentially improved fuel economy, making this an ideal performance upgrade for daily-driven trucks and SUVs.

Fitment:

• Nissan Frontier 4.0L V6
• Nissan Pathfinder 4.0L V6
• Nissan Xterra 4.0L V6
• Suzuki Equator 4.0L V6
• Emissions Notice: Not for sale or use in California

Key Features:

• Underdrive performance crank pulley
• Lightweight aerospace-grade aluminum construction
• Approximately 10% underdrive ratio
• Reduces parasitic accessory drag
• Frees up horsepower and torque
• Improves throttle response and acceleration
• Possible improvement in fuel economy
• Precision engineered by STILLEN

Performance Benefits:

• Increased wheel horsepower and torque
• Faster engine revving
• Improved acceleration
• Reduced rotational and accessory load
• Enhanced overall drivability

Technical Details:

• Material: Aerospace-grade aluminum
• Design: Underdrive lightweight crank pulley
• Approximate Underdrive: 10%
• Part Number: 400385
• Manufacturer: STILLEN