Like FTO said, finding someone to turn them off is going be hard.
I only know of two persons with a Stage II Whipple and 1 7/8" LTs running cat-less.
Plus, they're both also running a mono blade 155mm TB
But this was done years ago. Both are not daily drivers!!!
If my memory is still correct,
1 3/4" LTs work better and help to keep the TB from hunting (surging) especially when running a SC for the Raptor.
Just food for thought, have you looked into getting junk yard cats off a 6.2L
I believe the cats are the same on any 6.2L, like from a HD Van or HD pickup.
Just don't tell the junkyard you're looking for cats!!! Just the front complete exhaust.