Underdrive pullies for the Nissan Frontier, Pathfinder, Xterra and Suzuki Equator are a great way to increase the horsepower and performance of your 4.0 V6 engine.  An underdrive crank pulley adds a number of different benefits with the end result being a significant gain in horsepower and torque.

For starter's, an underdrive crank pulley works by underdriving some of your accessories by only 10%.  These accessories require horsepower and torque to get them spinning.  By underdriving them a little bit we can free up some of that horsepower while not making a significant impact on their performance.  This reduction in parasitic drag allows the engine to transfer that recovered power to the wheels of your truck!

Additionally, the light weight aluminum construction further aids in reducing the power required to spin the heavy OEM crank pulley.  By reducing this weight it allows the engine to spin the crank pulley much more easily thus allowing for that recovered horsepower to be transferred to the wheels.  

Overall, the combination of a lightweight, underdriven crank pulley leaves a result of a recovery of horsepower to the wheels that offers a noticeable improvement in horsepower, engine acceleration and fuel economy.

Features and Benefits:

• Lightweight aerospace aluminum construction
• Underdriven design transfers more power to the wheels
• Improvement in horsepower and torque
• Improved acceleration
• Improved fuel economy possible
• NOT FOR SALE OR USE IN CALIFORNIA