I have never heard of these exhausts but I have a chance to buy one for 125I was just curious how good they are, and if they sound well

 

You can expect a really deep rich sound.

One of my bikes has a Yosi RS3 and the other has an M4. Quality is comparable between the two of them but I prefer the M4 sound hands down.

 

well lets haave it M4 or RS3 I can get the M4 for 125 and the RS3 for 175? Which one does eveyone like better

 

buy it, i had an M4 on my F3, and it was awesome... wa wa wee wee

 

i have an m4 high mount and love it. has a nice rich tone to it and it follows the lines of the bike great.

 

yo! where did you find these so cheap?? awesome!

 

Yeah I would like to know where you found those prices too. Also a while back someone posted a link that had all different brand pipes and you could listen to them all. anyone know what that link is?

 

They are used pipes look at the forums on here for parts for sale you can find some pretty good deals, I found the 150 RS3 at a local salvage place guy totaled his bike put managed not to total the pipe too...dont ask me how but its working out for me, the M4 was sold so I am buying the RS3...hopefully I like it