I've used the V&H PCO pipe for two seasons and #3 and #4 headerpipes are very close to the front tire, even hit it when I land a wheelie or brake and turn at the end of the track.
Stock frame, GSX-R 1100 -89 forks and 17" wheel, it's a tight fit.
Maybe the other V&H you pointed out uses less space?
There's always the chance to cut and weld the one I have but they are no longer available from V&H so I'm trying to find another way...
In the last race of the season 2011 I had a GSX-R header fitted but it hangs very low, lot lower than frame rails.