Take control of your vehicle’s power and performance with Handheld Tuners from DiabloSport, Edge, Superchips, and Accel. These plug-and-play devices deliver instant horsepower, torque, and throttle response improvements with user-friendly interfaces and preloaded performance tunes. Ideal for both street and towing applications, handheld programmers let you read and clear DTCs, customize shift points, and fine-tune your driving experience with precision.

In-Cabin Tuners and Monitors from DiabloSport, Edge, and Superchips bring real-time power management and performance data directly to your dash. These advanced devices provide live monitoring, data logging, and on-the-fly tuning in a sleek touchscreen interface. Perfect for both street and off-road enthusiasts, in-cabin systems allow you to view critical engine parameters, adjust performance modes, and unlock horsepower—all without popping the hood.

AFM and DFM from Range Technology, and DiabloSport are an easy way to improve your late model vehicle in less than 30 seconds with no mechanical skills. You'll be able to alter or enhance OEM features such as stop/start and displacement-on-demand systems from GM (Active Fuel Management/AFM).

The Range Start/Stop Disabler eliminates the annoying auto start/stop feature found in many modern vehicles. Plug it into your OBD-II port and enjoy smooth, uninterrupted engine operation without reprogramming or permanent changes. Designed for GM, Ford, and Chrysler applications, this simple device improves drivability, extends starter life, and ensures your engine runs when you want it to—all with plug-and-play simplicity and no trace left behind.

Amp’d Throttle Sensitivity Booster is easy to install, delivers immediate improvement with pedal response, and will enhance your driving experience. Amp’d offers an incredibly simple solution that generates “seat of the pants power” you won’t find anywhere else.

Holley’s lineup of tuner accessories includes cables, mounts, and expansion systems for DiabloSport, Superchips, Edge, and Dinan devices. Keep your tuner connected, secure, and ready for performance adjustments.