Nomatter how much I search the forum I cannot find a direct answer on this

If you connect a Pacesetter Y pipe to a 3" catback
How are you holding this together?

Is the Y made slide over the I pipe without modification? Vise Versa?
Expand the I pipe, and use steped band clamp?
Butt them together and use a butt band clamp?

 

I have the Magnaflow catback and the intermediate pipe was slightly oversized so it slipped right over the end of the Pacesetter y-pipe. I then sealed it up with a 3" band clamp.

 

This is the only part that pissed me off all to @%#$ when I installed my pacesetter longtubes. The ORY was 3" and my catback (hooker cat back ) was 3" ( note: they do not "slide" into each other, despite the assurances from the reps. at pacesetter ). I ended up taking off the catback and took it to an exhaust shop, and they cut it down and clamped it to the ORY after welding a slightly bigger adapter to the catback. Good luck!

 

I was prepared to do what you had to... I was very surprised when the I-pipe just slid over the y-pipe. That was the only part of the header install that went well!

 

I had to expand a pipe (I think it was the y-pipe actually) and used a stepped band clamp.

 

3" Ball and Socket flange so that you can break it down if you have to work on anything. Makes life nice and also allows for some adjustability.