Cobra 4" NH SLIP-ONS BLACK 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 black for 2017-2025 Harley-Davidson Touring models, featuring a bell-end design that expands from 4" to 4.5" and an internal 8" louvered baffle for a classic, aggressive sound. Made in the USA and 50-state legal.

Features

• 4" body bells out to 4.5" for aggressive stance
• 8" spun and louvered baffle for distinct NH sound
• Trumpet-shaped inner tip for tuned resonance
• Rolled tip fin for clean finished look
• 50-state legal configuration
• Made in the USA
• Limited Lifetime Warranty

Specifications

• Brand: Cobra
• Manufacturer Part #: 6109RB
• Length: 31 in
• Width: 11.13 in
• Height: 5.56 in
• Weight: 21.18 lbs

Fitment

Fits 2017-2025 Harley-Davidson Touring models (FLT / FLH chassis).

Frequently Asked Questions

Will these fit my 2016 or older Touring?

No — these mufflers are designed specifically for 2017-2025 Touring models. Earlier bikes use different header and mounting geometry.

Are these 50-state legal?

Yes — Cobra designed this configuration to meet EPA and California emissions standards for street use.

Do I need to retune my bike with these slip-ons?

Slip-ons alone typically do not require ECU tuning, but a fuel/air recalibration can optimize performance if desired.

What's the sound like?

The 8" louvered baffle and trumpet-shaped inner tip deliver a deep, classic Harley tone — not overly loud but distinctly present.

Are they made in the USA?

Yes — Cobra manufactures these mufflers domestically.