Looking to improve the performance of your 2020+ Shelby GT500 5.2L Supercharged Mustang? Team JDM has proven custom dyno tune files that we use to tune your vehicle for maximum performance. Add over 30 HP and 30 TQ on a bone stock GT500! Improves throttle response and transmission shift points! Custom tuning raises the rev limiter and allows for gear and tire size changes. Easy to use hand held tuner loads in minutes and can easily be returned back to stock. Add a pulley, cold air, or exhaust to improve even more performance! Custom tuning requires a minimum of 91 octane.