I just noticed that on the website it said the piping was 60mm. I always thought that the greddy was 2.5" piping all the way through well when I calculated it all out it ended up the piping only being 2.36220". and unless im mistaken stock piping is 2.25"

just an observation, is the information I have incorrect?

 

the origina SP1 I had was 2.5", so is my current sp2..

 

i think stock is like a 2 or very close to 2 like 2.15 if actually measured.

 

are your sure sp2 is 2.5" 1fstmax? cause the greddy website itself says 60mm. Im just wondering because im trying to find what is most beneficial for my new 3.5 set-up