I got my pacesette headers a y pipe in the other day, waiting to find a 2 post to lift my truck to put them on, I'm wounding what size pipe I need to run the y pipe is 3 inch its a 5.3 stock. My plains are headers cold air intake a tune for now so not much and maybe in the future a super charger or turbo, now for the right back pressure what's size should I run I'm getting a borla or magnaflow muffler and kicking it out before the back tire

 

Single 3" will suffice...

 

Soo what do I need to do

 

So could I go from the 3 y pipe and reduce it smaller? To what size

 

 

He just said a single 3" pipe will work fine.

 

The ORY "Off Road Y Pipe" that you have from Pacesetter will bolt up to ANY catback exhaust made for your truck(including stock) If you are asking these types of questions you should take it to an exhaust shop and let them do it, or buy a cat back and bolt it all together...

 

+1, RibeiroBJJ hit the nail on the head, easiest thing to do would be to buy an aftermarket cat back of your choice and just bolt it right up...Corsa, Magnaflow, Borla, etc. Most if not all of the aftermarket single cat backs are 3" (except for diesel cat backs)

 

3 inch.