The vented disks were fitted to the Interceptor 3 models, Mk1s and Mk2s have solid disks. We've heard all the trials of those who have tried to convert Jag disks to the Interceptor and spent more on the conversion than the original disks and still had to turn around and buy the originals. Save yourself alot of time and grief, do it right the first time around. Don't forget to use organic pads as well! Great Photo eh?