We installed the new GNX 4.5" Slip-On mufflers on our shop 2020 Road Glide to see what sound they were putting out and what kind of Dyno numbers you could expect compared to stock. If you're not looking to change the entire exhaust system, slip-ons are a great option to change the sound and look of your bike.
NOTE: The current motor is stock, the only upgrade we did was the Arlen Ness Big Sucker Air Cleaner.
The S&S GNX mufflers are made in the USA and feature a black finish that matches the OEM heat shields. The louvered baffles give the mufflers a deeper rumble. The mufflers are come with a dB reducer should you wantr a more mellow sound. They are designed to fit with shocks up to 13.5" in length.
Check out the video below for a sound clip of the mufflers in action. We paired them with the stock head pipe and just for comparison, threw on the Bassani head pipe to see what kind of power and sound improvement we could get.
This Dyno Chart: Stock muffler / OE Head Pipe vs. S&S GNX Mufflers / OE Head Pipe
Dyno Chart: Stock Muffler / OE Head Pipe vs. S&S GNX Muffler / Bassani Head Pipe
Dyno Chart: Stock Muffler / OE Head Pipe vs. S&S GNX Muffler (with dB reducer Installed) / Bassani Head Pipe
Hit us up with any questions about any of the product we used on the bike.