I purchased all of my clutching as a kit off classifieds, everything i believe is to have come from airdam. I purchased it back in 2013, put the new pimary and secondary clutches on, but when i went to install the wet clutch on my 1000 mudpro, the case comes down and isn't enough clearance to run the larger diameter drum. The 700 engine case allows for the clearance. I was really looking forward to having the extra grab with my 29.5 outlaw 2's. It was the final piece to my build. billet diff covers, sld welded, machined primary and secondary cut and welded cover, rjwc exhaust. 29.5 outaw 2's.
Just looked it up, the 700cc wet clutch drum is 5.5" in diameter, and this upgraded one is 6" diameter. 10% more surface area to grab.