just purchased race baffles and y-pipe without cats are they pretty simple to install are do need to take to shop

Are you refering to an underseat R1?

If so you just undo all three pipe clamps, remove the seat cowling, take off the LH and RH heat shields from the mounting brackets and lift away the end cans and cat "Y" piece.

Fit the new "Y" piece, new cans and link pipes line it all up, do all the clamps up, replace the heat shields and seat cowl. there is nothing too hard about any of this so long as you have the basic tools you should be ok.

If it not an R1........... I dunno