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Cobra PowerFlo Slip-On Exhaust

Item: 341894

$643.07 – $731.15

Select Your Vehicle - Fitment Guaranteed

Cobra PowerFlo Slip-On Exhaust


With a 4.5" slim line tip at its end, the PowerFlo muffler smoothly tapers to its 4" front. Easy installation, incredible sound and top of its class performance the PowerFlo is tough to beat.

Acoustical engineering developments allow an incredibly deep sound because of intense, class-leading resonance absorption and prevention

The frequency and location of the perforation patterns in the cores creates significant sound scattering in the mid frequencies, which helps to enhance the low frequency tones.

  • Uses proprietary materials with specific acoustical dampening and thermal insulation properties
  • 3" high-flow core for superior performance
  • Limited lifetime manufacturer warranty
  • Sold in pairs
  • Easy to understand instructions and all required mounting hardware included with each kit
  • Made in the USA
Specification Details
Baffles Included Varies (make selection above)
CARB Approved Yes
Configuration Dual Muffler
Country of Origin USA
Engine Type Varies (make selection above)
Exhaust Diameter Varies (make selection above)
Finish Varies (make selection above)
Material Varies (make selection above)
Muffler Sleeve Varies (make selection above)
Warranty Varies (make selection above)

Vehicle Fitment


Fitment is guaranteed or your money back plus free return shipping.
Don’t waste time installing a product that doesn't fit. We worked hard ensuring that this product is an exact fit on the vehicles listed below.

Harley Davidson
  • FLHR Road King 1995-2021
  • FLHRC Road King Classic 2007-2013
  • FLHRCI Road King Classic 1998-2006
  • FLHRI Road King 1996-2006
  • FLHRS Road King Custom 2004-2007
  • FLHRSI Road King Custom 2004-2006
  • FLHRXS Road King Special 2017-2023
  • FLHT Electra Glide Standard 1995-2009
  • FLHTC Electra Glide Classic 1995-2005, 2007-2013
  • FLHTCI Electra Glide Classic 1996-2006
  • FLHTCU Electra Glide Ultra Classic 2017-2019
  • FLHTCU TC Ultra Classic Electra Glide Twin-Cooled 2015-2016
  • FLHTCU Ultra Classic Electra Glide 1995-2016
  • FLHTCUI Ultra Classic Electra Glide 1995-2006
  • FLHTCUL Electra Glide Ultra Classic Low 2015-2017
  • FLHTCUL TC Electra Glide Ultra Classic Low Twin-Cooled 2015-2016
  • FLHTI Electra Glide Standard 2003-2006
  • FLHTK Electra Glide Ultra Limited 2010-2023
  • FLHTKL Electra Glide Ultra Limited Low 2015-2019
  • FLHX Street Glide 2006-2023
  • FLHXI Street Glide 2006
  • FLHXS Street Glide Special 2014-2023
  • FLTCU Ultra Classic Tour Glide 1995
  • FLTCUI Ultra Classic Tour Glide 1996
  • FLTR Road Glide 1998-2004, 2007-2009
  • FLTRI Road Glide 1998-2006
  • FLTRU Road Glide Ultra 2011-2013, 2016-2019
  • FLTRX Road Glide 2015-2023
  • FLTRX Road Glide Custom 2010-2013
  • FLTRXS Road Glide Special 2015-2023

Customer Reviews

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Questions & Answers

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2003 flhrci with cobra headers-computer changes?

Greetings! really want a set of 4.5" slipons. I now have a big bore kit and cams, cobra headers and a simple after market air cleaner. Will I need computer changes or a visit to the dyno? Thanks! Mike

In the case of your machine's configuration, if you haven't adjusted fuel delivery already, you'll certainly need to do that. A trip to the dyno is always best, but you'll need the requisite fuel tuning components to get the job done. For the amount of work you've had done, you'll need a TTS MasterTune Bike Communications Interface along with the TTS MasterTune Cable Kit to get the job done. Something like an Fi2000R or FP3 isn't going to be able to deliver enough fuel to get the job done. That said, if you've already had the engine tuning done, then you can probably get away with installing the slip-ons without issue since most of the exhaust restriction was removed with the OEM headers. Still, to get the best possible engine performance and throttle response, we always recommend that fuel delivery is updated any time you change the way air gets into, or out of, the engine.

By Staff
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Your bike years only go up to 16 will these slip ons fit an 18 Street Glide Special?

Yes! If you were to choose the 2018 Harley Davidson FLHXS Street Glide Special PowerFlo slip-on muffler from our fit guide that's immediately to the right of the main image, you'd receive the correct parts to fit your machine.

By Staff
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what Air filter mods and tuner do you recommend. 2018 flhtkl

All of the new intakes flow quite a bit more than the stock air filter. I would suggest the S&S stealth intake, you can run it with the factory cover with an adaptor plate or use one of their stylized skullcaps if you are after a custom look. The Vance and Hines FP3 is the easiest tuner to get installed and works flawlessly.

By Staff
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After installing these pipes do I need to adjust the computer and fuel injection?

In most instances, on fuel-injected bikes at least, you won't need to adjust fuel delivery as the OEM ECU can handle those changes. Of course, this varies by machine. Now, if you have an aftermarket air cleaner on the bike in addition to the mufflers, then we advise would certainly advise adjusting fuel delivery to suit as the ECU doesn't have a proper map for that drastic of a change. If the latter describes your situation, we recommend a Cobra Fi2000R fuel tuner. The device is simple to install and adjust. And the included instructions provide excellent guidance on how to configure the device without the need to take a trip to a dyno tuner. Again, if you're just adding the slip-ons, there's no need to tune the bike. It's only when you go beyond those modifications that a tuner is required.

By Staff
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