I'm getting a Yoshimura RS3 stainless steal slipon, but i dont know if i need to rejet? or can i just put it on and go?

i really would like some opinions and advice!

ps. i know slip ons dont give much power, but im looking for sound, since my stock sounds horrible.

 

Its an '08 z400

 

if your quad is stock rejeting will help even befor you put the pipe on. as for the slip on? some say yes some say no. put it on and see if it pops on accel or decell. every bike and your location is diffrent. befor I did a bunch of work to mine it had a slip on and no jetting changes. I got it that way. I did a little to richen it up and got a little more performance. they are jetted lean for suz.