Cobra SPEEDSTER SLASHDOWN CHROME DYNA 06-11 — Harley-Davidson Dyna Street Bob, Dyna Super Glide Custom, Dyna Super Glide (2006-2011)

Cobra Speedster Slashdown slip-on mufflers in chrome for Harley Dyna models 2006–2011. Dual slash-cut tips deliver a classic cruiser tone while bolting directly onto stock Dyna headers without adapters.

Features

• Chrome finish
• Dual slash-cut tips
• Slip-on design for stock headers
• Direct bolt-on installation

Specifications

• Brand: Cobra
• Manufacturer Part #: 6857
• Length: 52 in
• Width: 22 in
• Height: 7 in
• Weight: 34.38 lbs

Fitment

Fits Harley-Davidson Dyna models 2006 through 2011 with stock head pipes.

Frequently Asked Questions

Will these fit my 2012+ Dyna?

No — this part is specific to 2006–2011 Dyna chassis. 2012 and newer Dynas use different header configurations.

Do I need to rejet or tune after installing these slip-ons?

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

Are they street legal?

Check your local noise ordinances — some jurisdictions have strict decibel limits. These are designed for street use but may exceed noise caps in some areas.

What's included in the box?

The pair of slip-on mufflers with mounting hardware. Stock Dyna headers are reused.