what is the quietest muffler

9 replies to this topic
  • todd764

Posted February 20, 2007 - 09:30 PM


I want a quiet muffler for my 04 wr450. when i bought it it came with a fmf factory 4 with the quiet insert, but i would like it a little quieter under 94 decibles. You guys have any ideas, i don't have the stock one. there is a ride this year that i want to go on but i need to be under 94 decibles. I tried to search first but couldn't come up with anything.
Thanks in advance......Todd

  • JSanfilippo

Posted February 20, 2007 - 10:04 PM


The 05-06 stock muffler is whisper quiet. There is a huge performance penalty though especialy with the stock pea shooter baffle set up.

  • todd764

Posted February 21, 2007 - 08:35 PM


I am looking for the quietest aftermarket muffler, not stock. is the FMF q2 the best?

  • David37

Posted February 21, 2007 - 08:48 PM


IMO the quietest aftermarket muffler is the WB E2 or the FMF Q2 or the new Q4.

  • JSanfilippo

Posted February 21, 2007 - 09:52 PM


I've heard great things about the Q4. Quieter than a Q2 and more performance is the general consensus. Same price too I believe.

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  • Just_a_trail_rider

Posted February 21, 2007 - 11:59 PM


The quietest thing you can get is the stock muffler with the insert removed. It will register at about 93db. I know this for a fact.

If you want to open it up a little more, add the PMB insert. You will then blow a 95.5b-96b, which is still acceptable in many places.

Power will be down a little, but you'll be able to twist the throlle more to compensate. no problem.

  • MaxPower

Posted February 22, 2007 - 08:46 AM


Im looking for a stock exhaust from a 05 or 06 WR450 also a yz 450 stock exhaust

  • todd764

Posted February 22, 2007 - 06:01 PM


thanks guys, i think i will try the q4.

  • trav298

Posted February 22, 2007 - 06:03 PM


i run a big gun evo x with the quiet insert and spark arrestor. not sure of db reading but its fairly quiet while not being too restrictive

  • xrmarty

Posted February 22, 2007 - 10:49 PM


I am looking for the quietest aftermarket muffler, not stock. is the FMF q2 the best?

The q2 is very quiet and it has a nice throaty sound. I have it on my KLR and it sounds great. Im thinking of getting one form my XR. If you want quiet I think the Q2 is what you are looking for.


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