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Trying to find exhaust that will meet 96db

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Okay so Im trying to find the best exhaust that will meet 96 dbs for my offroad rides that have sound check so I have to meet 96 db. The best pipes I have researched are the yoshi rs-2 and the mrd standard with inserts.  Both of these pipes are proven to meet 96 dbs?

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Most quiet inserts on most systems will get you 94-96 db.

Edited by billdirt1
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Just watched a FMF video on youtube yesterday that said their power core 4 with insert met the 96db idle level.

Id call BS on that one,  the powercore 4 is LOUD,  ive ridden a DRZ with the PC4 slip on many times,  its almost as loud as me MRD. 

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The stock exhaust is something like 86-88dB, and the FMF Q4 w/ powerbomb header is something like 92-94dB. Seems to me that the FMF Q4 w/ powerbomb header is the quietest aftermarket you can get.

 

All that said, the quietest exhaust you can probably get would be a RS2 full exhaust with ebarbaek's exhaust tip modification. http://www.thumpertalk.com/topic/487229-how-to-quiet-the-yosh-rs2a-littlevids-pics/

 

He had it down to 81dB at 15mph. Crazy!

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Id call BS on that one,  the powercore 4 is LOUD,  ive ridden a DRZ with the PC4 slip on many times,  its almost as loud as me MRD.

Id call BS on that one,  the powercore 4 is LOUD,  ive ridden a DRZ with the PC4 slip on many times,  its almost as loud as me MRD.

I watched the video, with a db meter. It's 96 at idle, not at throttle.

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I can confirm that the Powercore 4 is loud as shit.

My exhaust is trying to spit my baffle out, blew out 2/3 rivets and spits packing out regularly, probably making it slightly louder, but it's definitely louder than your typical straight piped Harley at speed.

 

I'll get a DB meter app on my phone later if any of you want a test.

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I can confirm that the Powercore 4 is loud as shit.

My exhaust is trying to spit my baffle out, blew out 2/3 rivets and spits packing out regularly, probably making it slightly louder, but it's definitely louder than your typical straight piped Harley at speed.

 

I'll get a DB meter app on my phone later if any of you want a test.

 

Most consumer cellphones' microphones max out at 92dB before they clip. So it won't really be much of a benefit in this instance.

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my q4 with quiet insert in is very quiet, certainly meets 96db tests. with it removed, it's fairly loud like most open pipes. 

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Who measures the DB rating of a pipe at idle, like you don't ride the bike at idling revs so why even talk about... :bonk:

 

Anyway the PC head pipe or E head pipe , matched with the FMF Q4 is going to get around mid 90's DB.....

 

It would be the best option in performance , keeping you in the ball park with sound output.

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Nothing scientific about this - but could be of interest all the same. I have a SM with full yoshi RS-2 and corked. I generally ride with 2 other guys - one on a Ducati 1100 Monster with Termignonis and the other with a Korean cruiser. No this is not a joke like the Irishman, the Englishman and the . . . add whatever.

 

The typical riding order down the road (for reasons fairly obvious) are Monster, DRZ, cruiser. Anyhoo . . . soundcheck from cruiser is that DRZ (corked) is massively louder than Monster (corked)  - about double - and about equal to  Monster (uncorked) based on past experience. No measuring instruments involved - just one guys eardrums. A bullshit measurement in the world of facts - but there it is.

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Who measures the DB rating of a pipe at idle, like you don't ride the bike at idling revs so why even talk about... :bonk:

 

Anyway the PC head pipe or E head pipe , matched with the FMF Q4 is going to get around mid 90's DB.....

 

It would be the best option in performance , keeping you in the ball park with sound output.

Testers at places where they measure sound levels. At idle and and something like half throttle. (bonk yourself)

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Testers at places where they measure sound levels. At idle and and something like half throttle. (bonk yourself)

Yup, this is how I got dinged with my MRD SSW. They measured from idle to a little over 1/4, almost half throttle.

 

FMF powercore 4 and powerbomb header where much quieter than MRD at idle and most of the throttle. Powercore gets pretty loud when to hit it though.

Edited by JFM43

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From what I have heard the MRD with quiet insert and spark arrestor is 96 db it sounds a hell of a lot quieter than without the both of them

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From what I have heard the MRD with quiet insert and spark arrestor is 96 db it sounds a hell of a lot quieter than without the both of them

im sure its even louder when you shorten it. just ask ron. haha... :eek:

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im sure its even louder when you shorten it. just ask ron. haha... :eek:

I'm against reductions. I need all I got.
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I had an fmf power core. It rocked and met the 96db. I also had a yoshi pro circuit (which I love but is 104db I think) a cobra and gytr on my 450 but If I had to go with a quiet pipe definately fmf. If you can afford the head pipe I recommend that bad dog as well.

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