anyone know how big the stock gsr ehxuast is, is it 2 inch pipeing or 2 and a half?

 

lol, it's NOT 2.5. probably 2"

 

2.5 my azz man..you must be nut to think it was 2.5 lol

here the math i measured last time but i forgot the exactl number...here 1.75<gsr exhaust's diameter< 2" for sure....if it 2 meaning you're lucky im sure it not over 2....take my words for it...

 

im guessing a little below 2" man, your dreamin if you got 2.5 stock

 

~2 inch diameter piping