ThunderMax 50 for 2002-2005 Touring®
ThunderMax PN#309-370 Applications:
• 2002-2005 EFI Touring® Models (88cui)
• 2001-2005 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!
Every degree and a half of throttle; every 256 RPM, there is a fueling point that is automatically adjusted. That means more control and a smoother running engine. With the built in barometric sensor you never have to think about ambient air changes. WideBand O2 sensors constantly read the Air Fuel Ratio and give live, real time feedback to the ECM. That means, no “accepting” the changes made to the map, once you key off the changes are written. The ThunderMax ECM is fully adjustable with our ThunderMax tuning software or can be used just by loading a basemap. The choice is yours.
Key Features
The original industry-leading wide-band AutoTune system, continuously optimizing your motorcycle as you ride for maximum performance and rideability. ThunderMax’s industry-leading wide-band AutoTune system utilizes 18mm oxygen sensors. Most aftermarket exhaust systems are already equipped with 18mm sensor bungs. If your exhaust uses smaller factory-style bungs or does not include oxygen sensor ports, installation of 18mm weld-in bungs may be required for installation.
More than a tuner, ThunderMax replaces the factory ECM with a purpose-built engine management system designed for maximum flexibility and performance.
Whether your motorcycle is stock or heavily modified, ThunderMax adapts to your combination of components without locking you into a single calibration.
The latest ThunderMax software is available as a free download for all ThunderMax users. Whether you’re installing a new ECM, updating firmware, viewing diagnostics, or refining your motorcycle’s calibration, you’ll always have access to the latest features and improvements at no cost.
Find application-specific installation instructions in the ThunderMax support library. Confirm your part number before installation.