Cobra SPEEDSTER 909 BLACK FXBB FXLR/S FLSL FLDE — Harley-Davidson Softail Heritage Classic, Softail Fat Boy, Dyna Low Rider (1977-2026)

Cobra SPEEDSTER 909 slip-on mufflers in black, engineered for Harley V-twin cruisers to bolt directly onto factory headers without cutting or welding. Direct replacement for stock mufflers that adds aggressive styling and classic cruiser tone.

Features

• Black finish
• Slip-on installation onto stock headers
• Fits Harley V-twin cruiser models
• 40 in length platform

Specifications

• Brand: Cobra
• Manufacturer Part #: 6712B
• Length: 40 in
• Width: 18 in
• Height: 9 in
• Weight: 26.18 lbs

Fitment

Fits Harley-Davidson FXBB, FXLR, FXLRS, FLSL, and FLDE cruiser models.

Frequently Asked Questions

Do these bolt onto my stock headers?

Yes — SPEEDSTER 909 slip-ons are designed to replace factory mufflers without header modifications.

Will these fit my Harley cruiser?

These are designed for FXBB, FXLR, FXLRS, FLSL, and FLDE models. Verify your exact model year and engine type before ordering.

Do I need a tune with these slip-ons?

Slip-ons alone typically do not require remapping, but a fuel/air adjustment may improve performance depending on other bike modifications.

What's included in the box?

The pair of SPEEDSTER 909 slip-on mufflers with mounting hardware ready to bolt to stock headers.