Power Pulley by aFe. Free up some hidden horsepower with the aFe Power Pulley! The Power Pulley replaces your factory crankshaft pulley. It underdrives your engine's accessories to reduce the parasitic loss, increasing horsepower to the rear wheels without any loss of vehicle functionality. It comes complete with new belts and all the necessary hardware.

The engineers at aFe are not only skilled at making products that enable your engine to make more power, they're also skilled at finding and freeing up horsepower your engine is already making. Crankshaft-driven accessories like the alternator and power steering pump take horsepower to turn?horsepower that could be going to your rear wheels. aFe found that be reducing the size of the crankshaft accessory drive pulley, they could underdrive the accessory pulleys and reduce the power consumed by the accessories (parasitic loss), without affecting their operation. Your alternator, power steering and anything else driven by the crankshaft pulley still function effectively, but more power is now available for the driveline. You get more horsepower and torque for increased performance.

The aFe power pulley is not only a great performance enhancing product; it's a product that will also look great under the hood. It's CNC machined from billet aluminum, and then black anodized for an aggressive look. It comes with new accessory drive belts that are properly sized for the new pulley. All of the included mounting hardware is made to BMW specifications. And the Power Pulley won't affect factory crankshaft harmonics or damping.

aFe (Advanced Flow Engineering, Inc.) manufactures performance products for late model cars, light trucks and SUVs. The company was founded in 1999 with an initial concentration on high performance air filters. Since then, the company product line has broadened to include cold air intakes, fluid filters, exhaust systems, intake manifolds, intercoolers, programmers, differential covers, transmission pans and throttle body spacers. The team of engineers, machinists, production and sales people at aFe have many years of experience in their respective positions, and together work to ensure they produce the best automotive products on the market.

Features:

• Complete Bolt On System
• Reduces Drag On Accessories
• Does Not Modify Factory Harmonics/Dampening
• Lighter Than Stock
• CNC Billet Aluminum
• Black Anodized
• 2 Year Limited Warranty