how loud

[Quad Dude]

i was wondering how loud would a procircut T-4 slip on would be on a 400ex compared to stock

[j400ex18]

i have one and it is alot louder

[quadkrazy400ex]

i used to have a full t4 system and when i had it no matter where i went it was the loudest bike there. :D

its a pretty big difference over stock