Fuel Injection improvements on the Harley Davidson Road King Custom FLHRS are usually expensive and complicated. The BoosterPlug is a better and proven alternative.
With the BoosterPlug you will have a better solution than the complicated and expensive Power Commander that is almost impossible to set up correctly.
The BoosterPlug requires no programming or advanced mechanical work, and it's easy and fast to install. Plug and play.
There is no better way to improve your riding experience:
- Improved and softer throttle response
- Improved acceleration
- Remove the low speed surging
- Stronger idle - no more stalling problems
- Little to no popping in your aftermarket exhaust
This version of the BoosterPlug covers all versions of the Harley Davidson Road King Custom FLHRS (2007 only).
General Installation Instructions
Bike Specific Installation Instructions