also the pipe for 03 999S bikes (deep sump) will not fit any bike swith the fabricated swingarm as the route up and around the swing arm is slightly different , in fact be very careful when buying a front pipe that you get the right one for your particular model
alternatively , scottch , who is en-route to Jerez does a very good job of cutting the cat out of the standard pipe , pm him when he's back next week