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:1996-1999 POLARIS INDY 500 RMK1993-1997 POLARIS INDY XLT SKS1994-1997 POLARIS INDY WIDE TRAK GT1984-1984 POLARIS SS1988-1989 POLARIS LONGTRAK1988-1995 POLARIS INDY TRAIL DELUXE1989-1989 POLARIS INDY TRAIL ELS1996-1997 POLARIS INDY ULTRA SP1984-1984 POLARIS STAR LONGTRAK1996-1996 POLARIS INDY 600 SP1990-1998 POLARIS INDY 4401988-1988 POLARIS INDY 400 SKS1980-1982 POLARIS GALAXY1997-2000 POLARIS INDY SUPER SPORT1988-1990 POLARIS STARTRAK1997-1998 POLARIS INDY XLT LIMITED1997-1998 POLARIS INDY ULTRA1989-1989 POLARIS INDY SPORT GT1981-1982 POLARIS TH-L INDY1995-1995 POLARIS INDY XCR 6002000-2003 POLARIS 500 CLASSIC1983-1983 POLARIS TX-L INDY1991-1991 YAMAHA VMAX (W/PERFORMANCE KIT)1996-1998 POLARIS INDY 440 XCR2009-2009 POLARIS WIDETRAK LX 5001993-1999 POLARIS INDY CLASSIC TOURING1997-1999 POLARIS INDY XCF1979-1979 POLARIS CENTURION L/C1983-1999 POLARIS INDY TRAIL1989-2000 POLARIS INDY 5001995-1995 POLARIS INDY XCR 4402000-2007 POLARIS WIDE TRAK LX2006-2006 POLARIS WIDE TRAK1983-1983 POLARIS CENTURION INDY1979-1979 POLARIS COBRA2011-2011 POLARIS 500 WIDETRAK LX1983-1987 POLARIS INDY 6001992-1992 POLARIS INDY 500 SP SKS1988-1988 POLARIS INDY 400 CLASSIC1988-1989 POLARIS INDY TRAIL SKS1994-1997 POLARIS INDY WIDE TRAK LX1988-1992 POLARIS INDY 6501996-1996 POLARIS INDY XLT SKS TOURING1997-1997 POLARIS INDY ULTRA SPX SSE1991-1993 POLARIS INDY WIDE TRAK1981-1982 POLARIS TH-L1997-1998 POLARIS INDY ULTRA TOURING1996-1999 POLARIS INDY TRAIL TOURING1995-1995 POLARIS