Hey I was looking at getting a yoshi RS-3 full system for my 400ex is there anything you guys can tell me about this exhaust in general. Some of the questions i have about it are..... is it loud?(because i ride by alot of old people at my cabin) DOes it give a good HP gain? Does it have a nice sound? Is it a good quality exhaust? And fo you know of any problems with the exhaust?

Sorry for all the quesiton I just wanna get the right exhaust for my quad so i dont screw up.

 

I've heard yoshi's on 400exs before, and with the quiet core they're not too loud, but without the quiet core it makes your brain itch. They do sound pretty sweet though

 

all pipes will be loud unless you have the quiet core installed. yoshi is a good pipe but it is some what loud without the core. it will give you a good boost in HP as long as you jet it right. I had one on mine for 3 years and the only problem I had was burning out the packing in it and not being able to find the packing to repair it
do a lot of research before you buy some pipes might not have quiet cores for them