Yoshimura Exhaust by RR | Jul 25, 2017 | RZR XP 900 | 0 comments I’ve the chance to purchase this exhaust for silly money. If I fit it to my standard XP900 will it improve it or cause me issues? Will I need a fuel controller to help it? Is it worth the effort? Utah RZR Rentalswhence Submit a Comment Cancel replyYou must be logged in to post a comment.