E9X M3 Performance Underdrive Pulley Kit

Product Details

Free additional power to your M3’s rear wheels without sacrificing or compromising your BMW’s reliability.

Machined from 6061-T6 aerospace aluminum, Macht Schnell Performance Underdrive Pulleys are strong as well as lightweight to limit parasitic drag from the accessories within a moderate level for maximum performance on or off the track. After machining and engraving, pulleys are then T3 hard anodized for additional strength, anti-corrosion & wear resistance.

Our DualDrive design replaces the Crank Accessory & Power Steering Pulleys, resulting in an additional 9-14 HP and 7-9ft. lbs TQ gain for the M3. Gains are due to a reduction in power required to turn accessories; an increase in accessories lifespan due to lower speed will also result. All factory harmonics/balancing are undisturbed.

Macht Schnell Performance Underdrive Pulleys have no negative effect on accessory operation and comes fully equipped with new belts. Already have this kit and need new belts? See T#14491 and T#14489

Performance Underdrive Pulleys Features:

• DualDrive design allows maximum performance, with minor effect on accessory speed
• Proper cooling temperatures are retained at proper levels on or off the track
• Maintains proper alternator speed, allowing sustained levels to sensitive control modules
• Machined from 6061-T6 aerospace aluminum
• T3 Hard-Anodized for maximum strength and corrosion/wear resistance
• No affects to crankshaft dampening or harmonics
• Simple bolt-on installation

Prop 65 Warning

Product Q&A

Lifetime Replacement