World's Largest Aftermarket Motorcycle Parts and Accessories Superstore!

Menu

Free Shipping. Shop Now.
Free Shipping. Shop Now.

ThunderMax 50 ECM with Auto Tune Closed Loop System

Select your motorcycle to guarantee fitment! Select A Motorcycle

  • ThunderMax 50 ECM with Auto Tune Closed Loop System
Product may vary from photo(s).

$899.99

Free Ground Shipping

Checking availability...

– Order in the next to ship today

J&P Part: 402-459

Description

How Auto Tune Works

ThunderMax 50 ECM with Auto Tune Closed Loop System

Fitment Note: Only fits 2008-10 Big Twin with 96" engines (except Throttle-By-Wire Touring Models and FXDF).

• 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, 50 State street legal 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

Made In The USA This product was proudly made in the USA

Product Specs

Manufacturer Part Number: 309-375

Open or Closed Loop: Closed

Sold in Units: Each

With/Without 02 Sensor: With

Fitment

Select your motorcycle to guarantee fitment! Select A Motorcycle

Fitment Note: Only fits 2008-10 Big Twin with 96" engines (except Throttle-By-Wire Touring Models and FXDF).

Click (+) to view all compatible models

Harley-Davidson® Models

Dyna Fat Bob FXDF : 2008–2010
Dyna Low Rider FXDL : 2008–2010
Dyna Street Bob FXDB : 2008–2010
Dyna Super Glide Custom FXDC : 2008–2010
Dyna Super Glide FXD : 2008–2010
Dyna Wide Glide FXDWG : 2008, 2010
Softail Cross Bones FLSTSB : 2008–2010
Softail Custom FXSTC : 2008–2010
Softail Deluxe FLSTN : 2008–2010
Softail Fat Boy FLSTF : 2008–2010
Softail Fat Boy Lo FLSTFB : 2010
Softail Heritage Classic FLSTC : 2008–2010
Softail Heritage FLST : 2008–2010
Softail Night Train FXSTB : 2008–2009
Softail Rocker C FXCWC : 2008–2010
Softail Rocker FXCW : 2008–2009
Softail Standard FXST : 2008–2010

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.

Fast Free Shipping on Orders at $39.99 & Over
Free Tech
Support
Largest
Selection
120 Day
Returns

Select Your Motorcycle

×
Live Help

Get Help From Our Industry Experts

Call Us 24/7 1-800-318-4823

Help / FAQs