Upgrade your Harley Davidson Road King Classic FLHRC to how it should have been delivered from the factory with the BoosterPlug fuel injection upgrade.
No need to spend a small fortune on complicated devices like the Power Commander + endless Dyno hours, to make your bike run like it should have from the factory.
The BoosterPlug is installed in less than 10 minutes. It plugs directly into your bikes wire harness using original connectors – no cutting or splicing.
The smarter upgrade to optimize the fuel Injection on your motorcycle:
- Soft and precise throttle control
- Harder acceleration.
- Eliminate the low speed surge problem
- Takeoff made easy by the stronger idle
- Reduced popping in your aftermarket exhaust
This version of the BoosterPlug upgrade covers all versions of the Harley Davidson Road King Classic FLHRC (2008-2016).
If you have an older or a newer Road King Classic FLHRC, you can find the BoosterPlug for it in the related products below.
General Installation Instructions
Bike Specific Installation Instructions