EFI made simple.

ThunderMAX is a complete, standalone ECM for all Delphi based motorcycles. ThunderMAX is a high-resolution Alpha/N-based system and is the most advanced engine management system available on the market today. ThunderMAX replaces the factory O.E. system with complete clean fitment in current O.E. location and connection to the HD harness. ThunderMAX is a Wide Band, Closed Loop system with Autotune. Tunes What you Ride, How you Ride, Where you ride, every time you ride! Increased throttle response, seat of the pants torque, smoother, and cooler running engine gives the rider satisfaction of performance and drivability. Available for 2001 to 2013 Delphi EFI based motorcycles including Thottle by Wire models as well as 1997-2001 Magnetti-Marelli based H-D motorcycles. ThunderMAX is proudly made in the USA and comes with a 3 year warranty.

ThunderMAX is engineered, designed and manufactured by Thunder Heart Performance Corporation, a leader in high technology systems and components for the motorcycles Industry since 1996.

ThunderMax Performance ECM’s with Integral Autotune System

  • ThunderMax with Autotune comes completely assembled and ready to install, no wire cutting or splicing required.
  • ThunderMax is a complete factory replacement and is NOT a Flash Tuner or in-line signal modifier.
  • ThunderMax Utilizes Wide band 18mm O2 Sensors for real time AFR analysis and correction at all RPM's and load levels operating as a closed loop control system to continuously self-adjust and properly tune the motorcycles air fuel ratio for all riding conditions.
  • Easy Installation: ThunderMax is designed to fit in the same location as the factory ECM. To install Remove factory ECM and install ThunderMax, plug into existing harness, change the O2 sensors, load the correct base map from Tmax Tuner Software, and ENJOY YOUR RIDE!
  • System includes ThunderMax ECM with Autotune Module, 2 wide band Bosch 5 wire O2 sensors with connection harness, TMAX Tuner software, and USB communication cable. Quick Start Easy Install and Comprehensive User’s Manual.
  • ThunderMax is available for all HD EFI motorcycles 2001 through 2013.
  • ThunderMax provides industry leading tech support with state of the art diagnostic data logging and collection process.
  • Purchase once, all software, firmware and extensive library of base maps for 88" to 131” are free which allows the system to grow with future bike modifications without future tuning expenses.
  • ThunderMax isNitrous, Supercharger and Turbo system compatible.
  • NO DYNO required, ThunderMax with Autotune continually tunes how you ride, where your ride, every time you Ride!
  • ThunderMax provides more power, increased torque, better sounding exhaust and quicker throttle response while optimizing your bikes power output by tuning for your riding style, riding conditions, and exhaust system.
  • Your Bike will run smoother and considerably cooler by continually maintaining the correct AFR and adjusting the base map as you ride with immediate real time feedback.
  • ThunderMax with Autotune is as simple as plug it in and Ride. However the TMAX Tuner Software allows advanced users and professionals the ability to control every parameter of the system for custom tuning if required.
  • Adjustable Rev Limiter, Idle Speed, and Speedometer Calibration.
  • Adjustable front and rear cylinder AFR maps, ignition timing (spark) maps, startup maps and warm-up settings.
  • Adjustable Engine Temp Alert, Injector size compensation, and decel pop control
  • H-D Digital Tech compatible.
  • Read and clear diagnostic codes through odometer window, Digital Tech, or through the free ThunderMax software.
  • Live Diagnostic data logging, monitoring, and recording ability.
  • Proudly engineered and manufactured in the USA with the highest quality components, precision machined billet aluminum cases, and encapsulated for water proofing.
  • ThunderMax comes with limited 3 year manufacturer’s warranty.
NOTE: ThunderMax requires 18mm x 1.5mm bungs (08 and 09 style and location) for the new wide-band O2 sensors. This may require modification or relocation in your exhaust head pipe OR replacement with a new aftermarket compatible exhaust system.

NOTE: Legal in California only for racing vehicles which may never be used upon a highway. Some products may not be legal for sale or use on pollution-controlled vehicles: Use ThunderMax50 foremission compliant applications.