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Cobra 3
Made in U.S.A.
34 Reviews

Cobra 3" RPT Slip On Mufflers Chrome


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J&P Part #:  178-324
Mfr Part #:  6052

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Cobra 3
Cobra 3" RPT Slip On Mufflers Chrome

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Cobra 3

Cobra 3" RPT Slip On Mufflers Chrome

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Product Details


Description for Cobra 3" RPT Slip On Mufflers Chrome

Cobra consistently offers the market some of the top performing products at an extremely affordable price. Take these 3" RPT Slip-On Mufflers for example, as it uses constant velocity cores and bonded e-glass and stainless steel mesh to unbeatable performance as well as sound.

• The RPT designation comes from adapting the design from out Race-Pro 4" muffler into this 3" size

• The bodies begin as 3" at the front until they expand to 3-1/2" at the rear

• The black tip is also the Race-Pro machined design that's held in place with 12-point bolts

• Billet RPT tip finishes off the rear

• 2" spun-louvered baffle creates back pressure and accelerates exhaust gases

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Cobra 3

Product Specs for Cobra 3" RPT Slip On Mufflers Chrome

End Cap Color:
End Cap Or Tip Color:
End Cap Or Tip Material:
End Cap Or Tip Style:
Straight Cut
End Cap Or Tips Finish:
Head Pipe Diameter:
Heat Shield:
Not Included
Manufacturer Part Number:
Muffler Color:
Muffler Diameter:
Muffler Finish:
Muffler Material:
Stainless Steel
Muffler Style:
Sold in Units:
Warehouse Part Number:

Fitment Questions?

With over 750 years of experience combined, our tech staff has the answers!

  • Harley-Davidson®

    • Softail Cross Bones FLSTSB : 2008–2011
    • Softail Deluxe FLSTN : 2007–2017
    • Softail Fat Boy S FLSTFBS : 2016–2017
    • Softail Slim S FLSS : 2016–2017
Product Notes

Important Product Notes

Note: Please see U.S. EPA and your respective state and local regulations to confirm noise and emission compliance.

Important Exhaust Notes:

• Note: With any new exhaust, we recommend changes to carburetor jetting or use of an aftermarket fuel injection control module.

• There is no warranty on exhaust pipes and mufflers with regard to any discoloration. Blueing is caused by tuning characteristics, cam timing, carburetor jetting, overheating, etc. and is not caused by defective manufacturing. No refunds on exhaust pipes once motorcycle is started unless there’s a manufacturer’s defect.

• Flanges and retaining rings are not included with most aftermarket exhaust for 1984-2013 Evolution and Twin Cam models. Re-use your existing hardware, or purchase replacement hardware.

Shipping Note

Due to state regulations we cannot ship this item to the state of California.

Product Videos

Ratings & Reviews

Help Customers Undertand This Product

34 Reviews
Rating Breakdown
5 stars
4 stars
3 stars
2 stars
1 star
June 23, 2020
I got these for my 15 Street Glide Special. They are amazing. They give a nice rumble when idling, not obnoxious are great sound as you accelerate.
June 12, 2020
These slip ons fit perfect. The sound is awesome. I highly recommend them.
June 10, 2020
Great purchase, great price. Very easy to install and sounds good!
May 20, 2020
Just the right sound for my H-D. These rpt’s are about medium decibel level compared to stock and mufflers that give you hearing loss. Now I have all three kinds. Not too loud at idle, low or cruising rpm’s but have a nice deep loud tone when throttling up.
May 18, 2020
These mufflers are fantastic. They have a nice mellow sound to them. Just what I was looking for. I give them a 5-star rating.
May 6, 2020
Rumbles at its best
April 6, 2020
Very straight forward fixing. Pipes outlook damn slick and awesome! Perfect roar, loud and crunchy when rev. Not those close-ear kinda loud but definitely satisfying! Medium-loud bass when idle. Definitely way better, hands down, than stick pipes! And thats what we aim for!
March 3, 2020
Great sound and simple to install.
November 4, 2019
October 31, 2019
The pipes were easy to install, and, I really like how they made my bike look. The sound of the pipes did not disappoint me in the least. The sounded sweet when I went for a ride the very next day.

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