I just installed my pacesetter y-pipe last night. it only figures that the drivers side collector was out of round so I had to modify the y-pipe to slip over it. I got it all up in place nicely (great fit once its on) and used band clamps rather than those guillotine (or whatever you call them) style clamps so I wouldn't have to wrestle it to get it off if I need to.

A problem I have noticed is that my fuel lines are all pretty close to the y-pipe. you can see in the pictures further down in this post how close. I know im one of many who have LTs and a y-pipe. what has everyone done to keep your fuel lines from melting and catching on fire?

On a side note the difference between mac mids and pacesetter LTs is incredible. I snuck around the backroads today (since I dont have a catback) driving her normally after not having it run for almost 4 months. Oohhh its good to have it back!

heres some pictures:
http://community.webshots.com/photo/...64521152taZfOq
http://community.webshots.com/photo/...64521152vmKcda
http://community.webshots.com/photo/...64521152qJSejX

 

Judging from the pic., it appears you have the same amount of clearance that I do. I have been running my long tubes for a year now and I haven't experienced any issues with the y-pipe and the fuel lines. I have heard of some people though wedging some heat shielding in there though for peace of mind.