Fuel Injection upgrades on the Harley Davidson Road King FLHR are usually expensive and complicated. The BoosterPlug is a better and proven alternative.
Compared to the Power Commander, the BoosterPlug offers similar or better results for must owners - at a much lower price and without the complicated setup.
You don't have to be a trained engineer or a computer programmer to install the BoosterPlug upgrade. Easy and fast plug and play installation.
Release the full potential in your motorcycle:
- Improved and softer throttle response.
- Harder acceleration.
- No more low speed surging.
- Stronger and more reliable Idle.
- Reduced Puffing in your aftermarket exhaust.
This version of the BoosterPlug upgrade covers all versions of the Harley Davidson Road King FLHR (2008-2016).
If you have an older or a newer Road King FLHR, you can find the BoosterPlug for it in the related products below.
General Installation Instructions
Bike Specific Installation Instructions