Carlisle Ultimax 3 has evolved into Ultimax PRO. Thicker cross section so more surface area is in contact with clutch. New cog design dissipates heat and aids flexibility Runs cooler for better performance. Run cool, run long & run fast with Ultimax PROAdditonal Fitment:2007-2010 ARCTIC CAT M8 2007-2010 ARCTIC CAT M6 2009-2009 ARCTIC CAT CROSSFIRE R 8002009-2009 ARCTIC CAT CROSSFIRE 800 SNO PRO2008-2008 ARCTIC CAT T5702007-2008 ARCTIC CAT F62007-2008 ARCTIC CAT F5 2011-2011 ARCTIC CAT M6 153 2008-2009 ARCTIC CAT CROSSFIRE 1000 SNO PRO2009-2011 ARCTIC CAT BEARCAT 570 XT2007-2010 ARCTIC CAT M8 SNO PRO2008-2009 ARCTIC CAT CROSSFIRE 10002007-2009 ARCTIC CAT F1000 LXR2008-2010 ARCTIC CAT CROSSFIRE 82007-2008 ARCTIC CAT F5 LXR2007-2009 ARCTIC CAT F10002007-2010 ARCTIC CAT F8 LXR2009-2009 ARCTIC CAT CROSSFIRE 6002007-2011 ARCTIC CAT CROSSFIRE 62007-2010 ARCTIC CAT M1000 SNO PRO2009-2009 ARCTIC CAT CROSSFIRE 8OO2007-2008 ARCTIC CAT CROSSFIRE 52007-2009 ARCTIC CAT F1000 SNO PRO2008-2010 ARCTIC CAT CROSSFIRE 8 SNO PRO2007-2009 ARCTIC CAT M1000 2009-2009 ARCTIC CAT CROSSFIRE 5002009-2009 ARCTIC CAT CROSSFIRE R 10002008-2008 ARCTIC CAT T5002010-2010 ARCTIC CAT M8 HCR2010-2010 ARCTIC CAT CFR10002007-2010 ARCTIC CAT F82007-2011 ARCTIC CAT F6 SNO PRO2008-2008 ARCTIC CAT F570 2007-2010 ARCTIC CAT F8 SNO PRO2010-2010 ARCTIC CAT CFR82007-2008 ARCTIC CAT F6 LXR