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 PRO Additonal Fitment:2001-2003 SKI DOO BRP SUMMIT X2001-2001 SKI DOO BRP MXZ STANDARD2000-2000 SKI DOO BRP SUMMIT 800 H.M.1999-1999 SKI DOO BRP MX Z 670 HO2001-2002 SKI DOO BRP MXZ TRAIL2004-2004 SKI DOO BRP LEGEND SPORT 7001999-1999 SKI DOO BRP MZX 7002002-2002 SKI DOO BRP SUMMIT HIGHMARK X2002-2002 SKI DOO BRP MXZ SPORT2001-2001 SKI DOO BRP FORMULA DELUXE GSE2002-2002 SKI DOO BRP SUMMIT SPORT2003-2003 SKI DOO BRP SUMMIT ADRENALINE2004-2004 SKI DOO BRP LEGEND SE 7002002-2003 SKI DOO BRP LEGEND SPORT2002-2003 SKI DOO BRP GRAND TOURING SPORT2002-2002 SKI DOO BRP MXZ RENEGADE1998-1999 SKI DOO BRP FORMULA Z 6702001-2002 SKI DOO BRP MXZ ADRENALINE2002-2003 SKI DOO BRP LEGEND SE1998-1998 SKI DOO BRP MX Z 6702001-2002 SKI DOO BRP SUMMIT HIGHMARK2000-2000 SKI DOO BRP FORMULA Z 7002000-2000 SKI DOO BRP MX Z 7002001-2001 SKI DOO BRP SUMMIT HM X2003-2003 SKI DOO BRP MX-Z RENEGADE2002-2003 SKI DOO BRP GRAND TOURING SE2001-2002 SKI DOO BRP GRAND TOURING GS2001-2001 SKI DOO BRP FORMULA DELUXE GS2001-2002 SKI DOO BRP MXZ X1998-1998 SKI DOO BRP SUMMIT 5832003-2003 SKI DOO BRP MX-Z ADRENALINE2004-2004 SKI DOO BRP LEGEND GT SE 7002001-2001 SKI DOO BRP SUMMIT STANDARD2000-2000 SKI DOO BRP SUMMIT 7002000-2000 SKI DOO BRP FORMULA DELUXE 7002003-2003 SKI DOO BRP SUMMIT HIGHMARK 1511999-1999 SKI DOO BRP FORMULA DELUXE 6702004-2004 SKI DOO BRP LEGEND SPORT GT 7002002-2002 SKI DOO BRP LEGEND GS2000-2000 SKI DOO BRP MZX 8001998-1999 SKI DOO BRP SUMMIT X 670