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Ignitions and Electrical› Computers, Chips, Modules and Programmers

Thundermax

Auto-Tune EFI System

$1,088.95 $919.95 Save $169.00

SKU: 309-485

Out of Stock
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
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Overview

The ThunderMax 309-485 is an electronic fuel injection (EFI) system designed for performance motorcycles. This system is intended for "RACE READY" vehicles only. It is compatible with 2004-2011 Dyna models and 2010-2013 Sportster models.
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The ThunderMax 309-485 is an industry award-winning, performance Electronic Control Module (ECM) designed specifically for EFI-equipped Harley Davidson motorcycles. This system serves as a stand-alone replacement for the factory ECM and arrives fully assembled with wide-band oxygen sensors, a plug-in harness, and the AutoTune module. The 309-485 module requires no wire-cutting or splicing for installation; it directly replaces the factory ECM and oxygen sensors. Users simply load a map after installation. The system includes robust wide-band oxygen sensors that report data to the module for optimized performance. This "RACE READY" system is compatible with a specific range of Harley-Davidson models. Applications include 2004-2011 Dyna models and 2010-2013 Sportster models.

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 Number309-485
CategoryIgnitions and Electrical
5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold
(760) 282-4645 hello@motormia.co

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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

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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