Hey guys, I was wondering what the diameter of the f4i's header outlet is.. aka where the mid pipe connects. I plan on making a shorty that comes straight out of the header and ive found a pipe locally.. unfortunately i needed a garage so the bike is at the parents house a couple hours away (blame the constant rain in FL)... if anyone could help out that would be great!

cliffs: size of header outlet (diameter)
-trying to make shorty exhaust that comes straight off it