getting new (new to me) Yosh can installed

[tripleb]

I'm going to get my new-to-me Yoshimura can installed this weekend if the muffler shop has time.  Do I need to bring anything like new exhaust gaskets or can they just cut the exhaust pipe and slip the can on and weld it?

also, is it better to install the 150 mains and then ride it to the shop to get the new can or keep my 140 mains on to ride to get the new can and then bring it home and install the 150s?

[scottpA_GS]

I would get gaskets, they are cheap and if they do need to take it off youll have em. 

As far as the jets, you wont need them right away, see how ir runs w/o em.. it may be fine if its not a full system