Owning a Hellcat in Atlanta and putting down less than 850 to the crank is ungodly! With our SMS850X ModBox you can expect no less than the best tuning package on the market as we have dyno, street and track tested our tuning in order to get the highest level of performance out of these hellys! This kit includes: - CUSTOM MUSTANG DYNO SMSTUNE - IN HOUSE ECM UNLOCKING SERVICE - INNOVATORS WEST 9.35 PINNED LOWER PULLEY - GATES GREEN HD BELT 180 THERMOSTAT COMBO - JLT PERFORMANCE INTAKE If you want advanced tuning options contact one of our SMS-Certified advisors to learn more about EXTRA Full Bolt-On options available for your Helly!
