ThunderMax PN: #309-368 #309-568 PERFORMANCE V-TWIN ELECTRONIC FUEL MANAGEMENT PRODUCTS. GO BACK TO EFI SYSTEMS

ThunderMax Exhaust Matched Series ECM Applications:
• 2008 - 2013 Touring® Models (Throttle-by-Wire)
• 2014 - 2016 Touring® Models (Throttle-by-Wire)
• 2017 Touring® Models (Throttle-by-Wire)
With 96 or 103 cui Engine Models With Stage 1 Upgrades (Hi-Flow Air Cleaner & Exhaust Systems)

ThunderMax is an industry award winning, performance ECM designed specifically for EFI equipped Harley Davidson® motorcycles. The ThunderMax Exhaust Matched Series (XMS) was developed for Touring models with basic, "stage-1" upgrades including a hi-flow air cleaner and an exhaust system. The ThunderMax XMS ECM comes 100% assembled and ready to install with pre-loaded matched "tunes" for your exhaust system - see available models below.

ThunderMax XMS Benefits Include:
  • Simple, "Plug & Play" Installation
  • Increased Throttle Response & Motorcycle Rideability
  • Adjustable Idle Speed & Speedometer Calibration
  • Upgradeable To Full, Wide-Band Performance ThunderMax EFI System
  • 100% Engineered & Made in the USA
  • 3-Year Factory Limited Warranty

  • Currently Available ThunderMax XMS Models:
  • PN#3309-368-x 2008-2013 Touring Models
  • PN#309-568-x 2014-2016 Touring Models
  • PN#309-588-x 2017 Touring Models
  • ThunderMax XMS Exhaust Maps:
  • Rinehart Racing
  • D&D Exhaust
  • Bassani Exhaust
  • Samson Exhaust
  • MisFit Industries

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    ThunderMax Exhaust Matched Series ECM utilizes the stock OE narrow-band oxygen sensors.
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    This product is intended for "RACE READY" vehicles only and is not for sale or use on vehicles otherwise subject to emission control requirements.  In the state of California, this product should not be used on any vehicle that is registered for use on public roads. Please view the ThunderMax 50 application guide for "STREET APPROVED" & ARB compliant products.

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