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Marine Insert Muffler- 4" Exhaust

Marine, Inserts

4" Marine Insert Mufflers
Availability: Estimated 2-4 Week Lead Time
Pricing: $329.95

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Marine Insert Mufflers: 4" Exhaust

Fits inside 4" 16ga Exhaust tubing.

Mounted via 2 tabs using supplied hardware.

Available in 4", 8", and 16" overall lengths.

Constructed from purge-TIG Welded 304 Stainless Steel.

Hand-Built in the USA from USA made materials and components.

**For offshore applications, 316 Stainless Steel is also available. Please call to inquire**

Suitable for mild to wild engine applications, these performance marine muffler inserts are capable of withstanding large horsepower engines, using water for increased muffling performance.


Customer Real-World Review:

 "We sea trialed the 40ft Garwood after installing your 5”x16” muffler inserts. Upon startup was immediately noticeable the change. Left the dock and we were able to have a conversation at the helm from idle thru W.O.T.  Being as I was the mechanic that sold these mufflers to the Captain with caution that I cannot guarantee the results, I was very impressed and so was the Captain. Owner has yet to experience and I’m sure he will feel the same. 

Thank you,


Fels Marine Services LLC




Shipping Information

  • Item Requires Shipping
  • 3.0 lbs.
  • W5.0000” x H5.0000” x L13.0000”
  • Free GROUND Shipping

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