3.0" or 2.5"

well i'm lookin for a test pipe to eliminate my cat on my VR4 and i planned on getting one off ebay but i noticed they are all 2.5" inch instead of the 3.0 that 3sx sells, is 3.0 the way to go?

sure is....go to maximalperformance.com might be a lil cheaper than 3sx. he is local to me so i feel i should help em out :D

dude thanks for link! that 3.0" is cheaper then the 2.5" on ebay, thanks man. i prolly order one tonight