Au Cai

[WAS 240]

Hey guys, Im going to get a stainless steel cai piping made up for my au, i read the au mods guide on the site and seen they were talking about 80-90mm pipe, will this clamp on to the throttle body alright?? and also should i get 80 or the 90mm?? just needed some help guys who know about this or have done it before cheers.