a liger is a cylinder made by Cast Precision Industries. Casted with a huge Arctic Cat f1000 intake and triple ex port with triple transfers. I have one mated to a zilla bottom end by an adapter plate. Skully has one also. Mine is a 102.5 bore.

http://www.cpindinc.com/pub/view_product/63?lm=5&name=3101-9779-144

I have a Boss Noss banshee kit on mine. I have not ran it yet. A boss Noss kit runs on lower nitrous pressure than conventional kits. ie. 300psi rather than 1050psi. It draws its own fuel as you hit the button. The nitrous nozzle has a "piston" in it that when nitrous is fed through it it draws the piston up crating a vacuum underneath it drawing fuel in than spraying it out the nozzle. I have a banshee kit because the nozzle are only capable of a 25hp shot. I plan on spraying a 50hp shot hence the banshee kit. Two nozzles at 25hp = 50hp total.