It is 2.5" in its alright! Believe me! Lol and not 2.75 anywhere its 2 7/8=2.88... ive gone thru so many mufflers its hammered in my head....

Hes stock until he gets bigger cam i wouldnt do 3" with the low compression the 2.5" duals is fine... its not making a ton of power just yet dont over kill....