Chuck, contact Ron (bdbanshee) and have him send you some pics of his mod he did to allow room for the filters. Really trick, he took metal tubing and ran it back further beyond the stingers, was an awesome idea. Another option is to run the cone/tapered K&N filter as well. If you get a chance, measure the distance between stingers, you should have 6 1/2 inches, if not, your defintely going to run into some fitment issue's.
Yes I swear they are twice as hard as stock jugs. You definitely need a pipe spring puller, 2 hands and some hellacious upper body strength. A big thanks to my wife for taking care of that for me.