#309-591 Thundermax® With Autotune for 2021-up Touring * Excludes 2023-2024 CVO®(VVT) and APEX Platform

ThunderMax® with Wide Band AutoTune is purpose-built to deliver uncompromising performance with advantages not possible with post-fuel or flash systems . ThunderMax’s Wide-Band AutoTune system will keep any engine properly tuned even with wide swings of changes of ambient air conditions.

ThunderMax’s® Wave Tune AutoTune analyzes, adjusts and anticipates the needed air/fuel correction via wide-band oxygen sensors processing at warp speed during to assure every combustion cycle is efficient, making any necessary adjustments to the injector pulse width to achieve the target air/fuel ratio while compensating for tolerance stack of injector flow, variance of fuel rail pressure and ambient air conditions.

* System Supports RDRS on 2021 and up Models!

Plus these features:

• Idle Speed & Rev Limit
• Accel Pump Simulation
• Start Fuel Pulse
• Decel Pop Control
• Speedometer Calibration
• Read Diagnostic Codes
• Running Statistics / Logs
• Engine Temp Alarm
• Live Monitoring & Recording

Digital Tech Compatible

ThunderMax® employs industry-leading tech support process though the Auto Support function in the software to directly connect you with a TMax support agent with just a few clicks of a mouse!

The factory exhaust use 12mm narrow-band sensors. Add 18mm bungs when using the factory pipe.

ThunderMax® is made in the USA by Thunder-Heart Performance Corp in White House, TN.

Not legal for sale or use in California on any pollution controlled motor vehicle.
Not legal for sale or use on any EPA pollution controlled motor vehicle.