The BoosterPlug is accepted world wide, as a brilliant and affordable aftermarket part to transform your Harley Davidson Softail Deluxe FLSTN from ”OK” to ”Absolutely Marvelous”.
No need to spend a small fortune on complicated parts like the Power Commander + endless Dyno hours, to make your bike run like it should have from the factory.
We designed the BoosterPlug to be easy and fast to install, so it comes with the correct connectors to let you install it without cutting and splicing wires. No additional aftermarket parts required.
Release the full potential in your motorcycle:
- Fix the snatchy throttle response problem
- Quicker acceleration
- Say goodbye to the low speed surge issue
- Stronger and more reliable Idle
- Reduced popping in your aftermarket exhaust
This version of the BoosterPlug covers all versions of the Harley Davidson Softail Deluxe FLSTN.
If you have a newer version of the Softail Deluxe, you can find the BoosterPlug for it in the related products below.
General Installation Instructions
Bike Specific Installation Instructions