now if i add one do i have to make any mods to the air box or any thing i have a totally sock predator except for trail tec bar and rath scoops n i just wanna add the hmf pipe slip on do i have to fix anything else be4 i do that? also isthere like a silencer core that i can add to it and take it off easyly when i get out ..... if so where can i get one and what would the price be thanks for the information ..........