THUNDERMAX ECM with Auto Tune - '11 FXST 309-361

Stock ECMs limit your '11 FXST's potential—they can't adapt to aftermarket modifications or optimize for your specific riding conditions. The ThunderMax ECM with Auto-Tune replaces that factory limitation with a closed-loop tuning system that continuously self-adjusts your air/fuel ratio in real-time, eliminating the need for expensive dyno tuning. Whether you've upgraded your exhaust, cam, pistons, or added forced induction, this system learns and compensates automatically, delivering crisp throttle response and reliable performance across all conditions.

• Plug-and-play installation
• Replaces factory ECM
• Includes two wide-band O² sensors
• Closed-loop auto-tune operation
• Fits '11 FXST models
• MPN 309-361
• Live data monitoring capability
• Diagnostic code recording
• Hundreds of downloadable maps
• Adjustable front/rear AFR
• Adjustable ignition timing maps
• Adjustable startup maps
• User-adjustable idle speed
• User-adjustable rev limit
• User-adjustable speedometer calibration
• Supports turbo applications
• Supports nitrous applications
• Supports supercharger applications
• Compatible with high-performance cams
• Works all exhaust systems
• Free software updates lifetime
• Free technical support
• Made in U.S.A.
• Includes TMax software
• Includes USB communication cable
• No dyno tuning required