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ThunderMax 50 ECM with Auto Tune Closed Loop System

Manufacturer Part Number 309-370

1 Reviews

This product fits a variety of motorcycles. Please select yours so we can find the right part and guarantee fitment. Select A Motorcycle

  • ThunderMax 50 ECM with Auto Tune Closed Loop System
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$899.99

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1 Reviews

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J&P Part: 402-613

Description for ThunderMax 50 ECM with Auto Tune Closed Loop System 

How Auto Tune Works

ThunderMax 50 ECM with Auto Tune Closed Loop System

• 88″ EFI engines only

• Have full control of your EFI system, freedom to make major and minor adjustments without a master’s degree in electronics and computers

• CARB-approved, street legal in all 50 States, including California, Closed Loop System - ARB Executive order # D-644

• ThunderMax is a completely new product that replaces the factory module, not an add-on box or signal modifier

• Purpose-built to deliver uncompromising performance but you don‘t have to be a rocket scientist to install it, program it or make adjustments

• As simple as we’ve made it to install and use, don‘t be fooled into thinking that this not one of the most sophisticated systems you can buy for your Harley

• Using the supplied SmartLink software and communication cable, you can adjust or monitor virtually every parameter of the system

• The ThunderMax makes sense in the long run as the system can grow and change as your engine does - just load a new map

• ThunderMax software, firmware and maps updates are free and accessible 24/7 with an Internet connection so you‘re only a mouse-click away from the latest available data and product support

• Backed by a 3-year manufacturer's warranty

Product Specs

Manufacturer Part Number: 309-370

Open or Closed Loop: Closed

Sold in Units: Each

Fitment for ThunderMax 50 ECM with Auto Tune Closed Loop System 

This product fits a variety of motorcycles. Please select yours so we can find the right part and guarantee fitment. Select A Motorcycle

Click (+) to view all compatible models

Harley-Davidson® Models

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Softail Heritage Springer Classic EFI FLSTSCI : 2005
Softail Heritage Springer EFI FLSTSI : 2001–2003
Softail Night Train EFI FXSTBI : 2001–2005
Softail Springer EFI FXSTSI : 2001–2005
Softail Standard EFI FXSTI : 2001–2005
Touring Electra Glide Classic EFI FLHTCI : 2002–2005
Touring Electra Glide Police EFI FLHTPI : 2005
Touring Electra Glide Standard EFI FLHTI : 2003–2005
Touring Electra Glide Ultra Classic EFI FLHTCUI : 2002–2005
Touring Electra Glide Ultra Classic FLHTCU : 2005
Touring Road Glide EFI FLTRI : 2002–2005
Touring Road King Classic EFI FLHRCI : 2002–2005
Touring Road King Custom EFI FLHRSI : 2004–2005
Touring Road King EFI FLHRI : 2002–2005
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Customer Reviews for ThunderMax 50 ECM with Auto Tune Closed Loop System 

Overall Rating:
5/5 based on 1 rating

5 by

Unbelievable tuning all in less that 10 minutes. Was only able to load stock base map, when I had BUB 7 2 into 1, Arlen Ness Big Sucker Stage I filter. T-Maxx rocks and adjusted from Base map to may set up with no issues.

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Important Product Notes

This item cannot be returned once the package is opened. Manufacturing defects must be addressed through the manufacturer directly. EPA Note: Requires exhaust system equipped for or modified for use with oxygen sensors Legal in California only for racing vehicles which may never be used upon a highway.

Shipping Note

Due to state regulations we cannot ship this item to the state of California for some motorcycles.

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