Exaust pipe diameter?
 

As I said before, I'm removing the cat asap as its clogged and casing the engine to over heat. I picked up an 18" x 2 1/2" resonator pipe from autozone, Looked the right size but the blazer isn't here for me to know for sure. Kept the recipt just in case. Just wondering if anybody here knows for sure?

i think 2.5 is too big. maybe 1.5 to 2" max. 2.5 is definately too big. r u just putting the pipe in place of ur cat? take the cat out and measure ur inside diameter of ur pipe. probably gonna be 1.5"

im 99% sure its 2.5''