THUNDERMAX USB Pigtail 309-424

If you're running a ThunderMax ECM on a Dyna, Softail Rocker, or early V-Rod with limited space around the engine control module, the THUNDERMAX USB Pigtail 309-424 solves a real installation challenge. This harness adapter lets you connect a second communication cable to your ThunderMax without cramming wires into an already tight engine bay. It's a straightforward solution that saves time during setup and keeps your wiring clean and organized.

The pigtail integrates directly into your bike's 36-pin ECM connector by inserting two terminated wires into unused ports—no cutting or splicing required. Made in the USA and designed specifically for tight-clearance applications, it's the difference between a hassle-free install and wrestling with cable routing.

• 36-pin ECM connector integration
• Two terminated wire connections
• Dedicated ground wire included
• Compatible with Dyna models
• Compatible with Softail Rocker
• Compatible with 02-05 V-Rod
• Requires ThunderMax Mini USB
• Requires November 2012+ ECM
• Bolt-on installation
• Minimal engine bay footprint
• USA manufactured
• MPN: 309-424