All cam arms sold here are either original equiptment in the Comet drive clutches or a popular replacement for trail riding or racing. Cam arms will not always be stamped with the name they are called because they are often made from another cam arm. Note: All carm arms are sold EACH - You must order FOUR of these arms to get the correct cam arm weight for a 4-Pro clutch and THREE for the 102-C 108-C and 108-EXP cluthes. Note: Comet arm weight objective is within .75 grams of that listed. Certified weights would be significantly more expensive. The variance may occasionally exceed 2 grams and is a result of greater or lesser arm density. This item fits H-D the following vehicle applications: fits Arctic Cat™ Crossfire 600 EFI 2007-2010 fits Arctic Cat™ EXT 580 1994-1996 fits Arctic Cat™ EXT 580 EFI 1997 fits Arctic Cat™ EXT 580 EFI Deluxe 1996-1998 fits Arctic Cat™ F6 EFI 2007-2008 fits Arctic Cat™ F6 Firecat 2004 fits Arctic Cat™ M6 EFI 141 2005-2007 fits Arctic Cat™ M6 EFI 153 2005-2010 fits Arctic Cat™ Mountain Cat 570 2003-2004 fits Arctic Cat™ Mountain Cat 600 EFI 2004 fits Arctic Cat™ Pantera 600 EFI ESR 2002-2003 fits Arctic Cat™ Powder Extreme 1998 fits Arctic Cat™ Powder Special 600 1997-1999 fits Arctic Cat™ Sabercat 600 EFI LX 2004-2006 fits Arctic Cat™ Triple Touring 1999-2001 fits Arctic Cat™ ZL 580 EFI ESR 2000 fits Arctic Cat™ ZL 600 EFI 1999-2003 fits Arctic Cat™ ZR 580 1994-1996 fits Arctic Cat™ ZR 600 EFI 1998-2002 fits Arctic Cat™ ZRT 600 1996-2002