Note: Trike Models an updated firmware file prior to installation (Due to traction control / RDRS) Please contact Rollies or support@thunder-max.com for this.
Fitment
2024 Touring Models:
Road King Special – 114ci, Same as 2023 (
underMax 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 u
1000677 & 41001165
Tech Tips:-
* Fits BOTH Air & Water Cooled Models
* Exhaust Note: On 2010up Touring models, the OEM exhaust system has 12mm o2 ports. The factory 12mm exhaust system is not compatible with the 18mm ThunderMax Wide Band
