Oh, those are the super trick, light weight illegal ones that the fast guys use!!!

Back to reality
The 240 and early 260 housings are just a couple thousanths over 2". The late 260 and 280 housing are like 2.16x". The Koni's require the larger housings. You need a late 260 or 280 housing. I had to make all new ones when I changed from Carrera to Koni a few years ago.

Mike