One of the best upgrades for automatic equipped Mustangs is a TCI¨ torque converter. Increasing your converterÕs rpm stall speed gets your engine into the powerband earlier, providing quicker acceleration and lower elapsed times. Several stall speeds are available for street Mustangs and custom rpm stalls for more race oriented set-ups. Triple testing, including cutting-edge computer balancing, guarantees that you receive the highest quality torque converter available.