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    ← ECU / Tuning
    ThunderMax ECM Performance Auto Tuner For Harley

    ThunderMax

    ThunderMax ECM Performance Auto Tuner For Harley

    $919.99

    Fits 41 Harley-Davidson models

    • Electra Glide Classic FLHTC/I1999–2001
    • Electra Glide Standard FLHT2019–2020
    • Electra Glide Standard FLHT/I1999–2001
    • Electra Glide Ultra Classic FLHTCU/I1999–2001, 2017–2019
    • Electra Glide Ultra Limited CVO/SE FLHTKSE2017–2020
    • Electra Glide Ultra Limited FLHTK2017–2020
    • Electra Glide Ultra Limited Low FLHTKL2017–2019
    • Freewheeler FLRT2017–2020
    • Night Rod Special VRSCDX2007–2017
    • Night Rod VRSCD2006–2008
    • Road Glide CVO/SE FLTRSEI22001
    • Road Glide CVO/SE FLTRXSE2018–2020
    • Road Glide FLTR/I1999–2001
    • Road Glide FLTRX2017–2020
    • Road Glide Limited FLTRK2020
    • Road Glide SE FLTRSEI2000
    • Road Glide Special FLTRXS2017–2020
    • Road Glide Ultra FLTRU2017–2019
    • Road King Classic FLHRC/I1999–2001
    • Road King FLHR/I2000–2001, 2017–2020
    • Road King Special FLHRXS2017–2020
    • Softail Breakout 117 FXBR2023–2024
    • Softail Fat Bob 114 FXFBS2021–2023
    • Softail Fat Boy 114 FLFBS2021–2024
    • Softail Heritage Classic 114 FLHCS2021–2024
    • Softail Heritage Classic FLHC2021
    • Softail Hydra-Glide Revival 114 FLI2024
    • Softail Low Rider S FXLRS2021–2024
    • Softail Low Rider ST FXLRST2022–2024
    • Softail Slim FLSL2021
    • Softail Sport Glide FLSB2021
    • Softail Standard FXST2021–2024
    • Softail Street Bob 114 FXBBS2021–2024
    • Street Glide CVO/SE FLHXSE2017–2020
    • Street Glide FLHX/I2017–2020
    • Street Glide Special FLHXS2017–2020
    • Street Rod VRSCR2007
    • Tri Glide Ultra Classic FLHTCUTG2017–2018
    • V-Rod Muscle VRSCF2009–2017
    • V-Rod VRSCA2002–2006
    • V-Rod VRSCAW2007–2010

    ThunderMax ECM Performance Auto Tuner For Harley The ThunderMax ECM With AutoTune Closed Loop System is the high-tech way to manage every aspect of your fuel curve for the best throttle response available in an aftermarket fuel system manager. It mounts conveniently in place of your factory ECM and plugs into your existing harness, and uses a closed-loop control system to continuously self-adjust and properly tune the motorcycle's air/fuel ratio for all riding conditions. If you start at sea-level and ride up to a mountain pass, the ThunderMax will automatically adjust your tune to keep your engine running cool and happy! There are plenty of piggyback tuners on the market that simply modify your ECM (electronic control module) they are capable of making basic adjustments suitable for mildly upgraded bikes, but none of them can make real time adjustments while you ride. For that type of performance you need a closed loop tuner and the ThunderMax ECM replacement is one of the best! Consider it a brain transplant for your bike! The ThunderMax system utilizes wide-band O2 sensors, along with your bikes factory sensors to monitor and adjust your air-fuel ratio in real time! Every degree and a half of throttle rotation or 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 their free tuning software or can be used just by loading a base map. Features: Mounts in place of factory ECM Real time auto-tune adjustments Start with a base map then let auto tune dial in your ride Compatible with high-performance camshafts, turbo, nitro and superchargers Monitor, record and analyze diagnostic codes and stats Free firmware, tech support and updates Note: System requires 18mm O2 sensor ports to accommodate the wideband sensors, stock pipes will need to have the 12mm bungs removed and 18mm bungs welded in place.

    Brand
    ThunderMax
    Category
    ECU / Tuning
    Where to buy

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    MerchantPrice
    RevZilla$919.99Buy

    Price history

    Every price we have recorded, as observed. A line holds flat until the next time we saw the price change.

    $800$850$900$950$1,000$1,05010:56 PM4:56 AM10:56 AM4:56 PM10:56 PMRevZilla β€” $919.99 on 9/25/2026
    RevZilla

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