The ThunderMax ECM replaces the stock module and helps “unlock” various performance advantages. ThunderMax’s key performance advantage relies upon its proprietary AutoTune technology which utilizes 18mm Bosch wide-band oxygen sensor feedback to provide continuous AFR tuning corrections based upon riding conditions like temperature and altitude. The integral ThunderMax AutoTune system combined with the other system design advantages helps provide a motorcycle with increased throttle response & torque, improved overall rideability & performance, and a smoother & cooler running engine.