Cobra 4" NH SLIP-ONS CHROME FLH/FLT 17-22 - 2017-2025 — Harley-Davidson Road King Special, Tri Glide Ultra Classic, Street Glide (2017-2025)

Cobra 4" NH slip-on mufflers in chrome for 2017-2025 Harley-Davidson Touring models, featuring a design that starts round then bells out to 4.5" at the tip for aggressive stance. Built in the USA with an 8" spun and louvered baffle producing a distinctive NH tone, and 50-state legal for street use.

Features

• 4" diameter body that bells out to 4.5" at the tip
• 8" spun and louvered internal baffle
• Trumpet-shaped inner tip for balanced sound
• Rolled and finished tip for clean appearance
• 50-state legal configuration
• Made in the USA
• Limited Lifetime Warranty

Specifications

• Brand: Cobra
• Manufacturer Part #: 6109
• Length: 31 in
• Width: 11.13 in
• Height: 5.56 in
• Weight: 20.98 lbs

Fitment

Fits 2017-2025 Harley-Davidson Touring models (FLT) with stock head pipes.

Frequently Asked Questions

Are these slip-ons or do they require new headers?

These are slip-ons that bolt onto your stock header pipes — no welding or fabrication needed.

Is this system street-legal?

Yes — Cobra engineered these to be 50-state legal for street use with the louvered baffle design.

What kind of sound does the NH baffle produce?

The 8" spun and louvered baffle delivers a distinctive NH tone that's louder than stock but not excessive.

Will I need to tune my bike after installing these?

Slip-ons typically do not require ECU tuning, though a fuel tune may optimize performance depending on other mods.

Do these fit 2016 or older Touring models?

No — this part is designed for 2017-2025 Harley Touring only. Older models need a different slip-on.