ThunderMax PN#309-373 Applications:
• 2006 EFI Touring® Models (88cui)
• 2006 EFI Softail® Models (88cui)
"Street Approved" / California ARB E.O. D-644

ThunderMax is an industry award winning, performance ECM designed specifically for EFI equipped Harley Davidson® motorcycles. This highly advanced, stand-alone tuning system utilizes proprietary AutoTune technology with wide-band oxygen sensors to deliver unmatched performance and rideability. ThunderMax comes 100% assembled, ready to install with no wire-cutting or splicing required. Simply replace the factory ECM and oxygen sensors, load a map, and enjoy your new ride!

ThunderMax 50 Benefits Include:
  • Easy to Install & Simple to Use
  • Increased Engine Performance & Motorcycle Rideability
  • Cooler, Smoother Running Engine
  • Adjustable Idle Speed & Rev Limit Control
  • No Dyno Required - Automatically Tunes for Riding Style & Riding Conditions
  • 100% Engineered & Made in the USA
  • 3-Year Factory Limited Warranty

  • ThunderMax System Includes:
  • ThunderMax 50 Performance Engine Control Module (ECM)
  • Two (2) Wide-Band Bosch 5-Wire Oxygen Sensors (18mm) with AutoTune Connection Harness*
  • Communication Cable
  • TMax50 Software Disc
  • ThunderMax Quick Start Easy Install and Printable Comprehensive User’s Manual
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    The ThunderMax 50 software allows access to approved, non-emission related adjustable system features compliant with California ARB regulations. Certain settings are non-adjustable and vary per motorcycle model.

    • Approved or Non-Emission Related Adjustable Rev Limit, Idle Speed, and Speedometer Calibration
    • Approved or Non-Emission Related Adjustable Closed-Loop AFR Targets
    • Approved or Non-Emission Related Adjustable Ignition Timing (Spark) Maps
    • Adjustable Engine Temperature Alert Alarm
    • H-D® Digital Tech Compatible
    • Read & Clear Diagnostic Codes through Odometer Window, Digital Tech or Through the ThunderMax Software.
    • Records Running Statistics Every 100 RPM / Engine Temperature Logs
    • Live, Real-Time Engine Tuning
    • Live, Real-Time Monitoring
    • Live, Real-Time Recording
    Click to Expand
    For 2006 Touring® Models and 2006 Softail® Models: ThunderMax® includes wide-band, 5-wire oxygen sensors that thread into 18mm x 1.5mm bungs located near the exhaust port, same thread size and location as stock sensors.
    Click to Expand
    This product has been approved for street use in the state of California by the California Air Resources Board (E.O. D-644). ThunderMax does not approve any other modifications to the motorcycle. Other motorcycle modifications are subject to scrutiny under California ARB by Section 27156 of the Vehicle Code for emission critical devices.

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