Free additional power to your M5/M6’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 a 18-20 HP and 16-20ft. lbs TQ gain for the M5/M6. 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 come fully equipped with new belts.
DualDrive design allows maximum performance, with minor affect 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
Vehicles Supported BMW E60 M5 BMW E63 M6 BMW E64 M6