Have full control of your EFI system, freedom to make major and minor adjustments without a master's degree in electronics and computers CARB-approved, 50 State street legal including California, Closed Loop System - ARB Executive order # D-644 ThunderMax is a completely new product that replaces the factory module, not an add-on box or signal modifier Purpose-built to deliver uncompromising performance but you don't have to be a rocket scientist to install it, program it or make adjustments As simple as we've made it to install and use, don't be fooled into thinking that this not one of the most sophisticated systems you can buy for your Harley Using the supplied SmartLink software and communication cable, you can adjust or monitor virtually every parameter of the system The ThunderMax makes sense in the long run as the system can grow and change as your engine does - just load a new map ThunderMax software, firmware and maps updates are free and accessible 24/7 with an Internet connection so you're only a mouse-click away from the latest available data and product support Backed by a 3-year manufacturer's warranty