The M8 engine is a powerhouse, but a low idle combined with a plugged up exhaust conspire to mute the true sounds of freedom that this machine was designed to emit. Not to worry, S&S have created the GNX slip-ons with one thing in mind and that’s belting out the flag waving, eagle flying song of the American v-twin. Combining a 4.5" shell with a tuned baffle and race inspired tip, the GNX lets the sound and power flow out of the M8. Wait, you only want one eagle and a few flags? Not a problem, they include a removable dB reducer that lets you tune the sound to suit your version of the American dream. Made in America, the GNX features the durable Guardian Black finish and is relieved for shocks up to 13.5"
Fitment
- 2017–'22 M8 touring models
Features and Benefits
- 4.5" slip-on with premium fit, finish, sound, and power!
- Guardian Black muffler body finish
- Guardian Black is exact match to OEM header
- S&S Race inspired end cap in Tuxedo Black finish
- Unique louvered baffle delivers a rowdier tone
- Clears up to 13.5" shock lengths
- Removable dB Reducer
- Made in USA!
NOTE: Does not fit trike models
DISCLAIMER:
Qualified manufacturer declared U.S. 50-State legal emissions replacement part on all 2017-'22 FL Touring models.
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GNX Slip ons 2022 Street Glide Spec
Easy to put on took about 20 minutes. Got a nice rumble to them, now the bike sounds good and not making the neighbors too upset.
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2021 FLTRXS
The mufflers look and sound as advertised. The muffler clamps that they want you to use have a Allen head bolt, and the directions say nothing of a 6 mm Allen socket being needed for installation. I should have not followed the directions and use the original Harley muffler clamps. Stripped out the Allen bolt while trying to torque the clamps down to spec.
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2022 Road Glide Limited
Very happy with the sound and appearance on my new Road Glide. Rowdier than the MK45, as S&S says, is a great description, much improved over the stock sound with no other mods. I'm running with the db reducers out and I can feel no loss in low end torque. S&S quality and a couple hundred less than my other options, couldn't be happier with my purchase.
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GNX mufflers Rock
I put GNX mufflers and S&S 475 cam. My 2021 Road Glide Special pulls like a possessed demon now.
