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Ignitions and Electrical› Computers, Chips, Modules and Programmers

ThunderMax

AutoTune EFI System w/ Wide-Band O2 Sensors

$1,088.95 $939.00 Save $149.95

SKU: 309-466

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$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
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Moderate — 2–4 hours

Overview

The ThunderMax 309-466 is an Electronic Fuel Injection (EFI) system designed for Harley Davidson motorcycles. It features AutoTune technology with wide-band oxygen sensors for real-time adjustments. The system includes an ECM, Auto-Tune Module, plug-in harness, two wide-band sensors, TMax software, and a communication USB cable.
Show original supplier description
The ThunderMax 309-466 is an advanced, stand-alone Electronic Fuel Injection (EFI) system engineered specifically for EFI-equipped Harley Davidson motorcycles. This system replaces the stock module to unlock performance advantages not achievable with flash or piggy-back tuning devices. Featuring proprietary AutoTune technology, the 309-466 utilizes wide-band oxygen sensors to monitor and adjust fuel mapping in real-time. This allows the system to learn and adapt to engine modifications and operating conditions, ensuring optimal performance. The package includes the ThunderMax ECM with Auto-Tune Module, a plug-in harness, two wide-band sensors, TMax software, and a USB communication cable for easy installation and tuning. Installation involves replacing the factory ECM and installing the new oxygen sensors. Some modification to the plastic ECM caddy may be required for a proper fit, a process described as easily accomplished. It is constructed from durable aluminum and uses 18mm wide-band oxygen sensors. This ECM auto-tuner is compatible with 2002 - 2017 V-Rod® Models. It offers adjustable warm-up settings and comes with a three-year warranty.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandThunderMax
Part Number309-466
CategoryIgnitions and Electrical
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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

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