exhaust help
 

so i plan on doing a res delet on my sc400 and gunna try to do it in my garage and going to buy exhaust sleves and clamps intill i get the full amount to do a full exhaust. i looked all around and keep coming up with different pipe size readings raning from 1 1/8 to 2 1/2 so i dont know which size to know. does anyone know that size of the pipe.

Are you asking what the stock size is or the best replacement size

stock for the time being