Motorcycle Garage is the premiere fuel injection, Intake and performance specialists. We offer a variety of performance parts and lead the power sports industry in ThunderMax® with Auto Tune. ThunderMax is the industry’s first and only stand-alone Performance EFI Engine Management System developed specifically to meet the tuning needs of both Cable and Throttle-By-Wire Harley-Davidson® motorcycle owners. This highly advanced tuning system allows the user to support a wide range of performance upgrades with ease. Our large database of maps allows us to pre-program your EFI controller. We also build custom maps on our CycleDyn high-performance motorcycle chassis dynamometer.