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MBRP Quiet Tone Muffler Resonator - 4" or 5"


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Product Details

Product Name: Quiet Tone Muffler Resonators - 4" or 5"
Manufacturer: MBRP
Application: Fits Most Diesels

5" Quiet Tone Muffler Resonator Features:

  • Up to 10% dB reduction compared to regular performance muffler
  • Eliminates drone under load or towing conditions
  • Direct replacement for all MBRP 5" performance mufflers
  • True 5" core for maximum flow
  • 8" Diameter Body

4" Quiet Tone Muffler Resonator Features:

  • Dual core technology provides optimal flow in conjunction with superior sound suppression
  • Perfect for over the road towing applications as cab noise is greatly reduced
  • Available in our Pro series (T304 stainless), XP series (T409 stainless) and Installer series (aluminized)
  • 4" inlet/outlet configuration that can replace any MBRP or competitor muffler in a 4" system
  • Over a full year of on road testing, this muffler works

MBRP's Quiet Tone muffler resonator features a high flow spiral louvered core, fits most exhaust systems and is a direct replacement for all MBRP performance mufflers. With over triple the sound cancelling packing it eliminates drone under load or towing conditions and delivers up to a 10% dB noise reduction compared to a regular performance muffler.


  • I recieved this muffler a week ago. Took it out of the box today, it's not a spiral core,and louvers are same on both ends, going the wrong way. Mbrp says to install it so exhaust flows overvthe louvers ,that is impossible within muffler,as both ends have louvers going wrong way. Is this a piece of junk or what is up?

    James butler | 2/27/2023

    Please send in photo’s to our, [email protected] email address.

  • Will this work on a 4BT swap? Customer has a 1993 dodge 4BT in a old bronco. His complaint is the exhaust system he has on there now is way too loud, so I'm trying to find him something quieter.

    Ciera R Ronk | 11/19/2021

    Yes, if you have a 4”or 5” exhaust.

  • Does this product come with clamps or does it need to be welded onto pipes?

    kyle brauner | 3/12/2021

    Clamps not included. Welding not required.

  • Does it effect performance

    Frankie Nelson | 12/8/2020

    No, designed to quiet tones and retain performance.