These exhaust mounting bolts are exact replacements to the originals. Carriage bolt size is 5/16 x 18. Gold zinc plated finish for corrosion resistance. Replacement to Polaris part number 7515316. Sold as a set of TWO. Used on almost all polaris ATV models and some Rangers: 1993 250 1994-95 300 1993 350L 1994-95 400L 2017-19 ACE 500 2014-19 ACE 570 2016 ACE 900 2004-05 ATP 330 2004-05 ATP 500 1997 Big Boss 400L 1999-01 Diesel 2008-15 Hawkeye 2000 Magnum 325 2003-05 Magnum 330 1995-98 Magnum 425 1999-03 Magnum 500 1999-05 Ranger 2006-10 Ranger 500 2014 Ranger 570 2006-09 Ranger 700 2010-16 Ranger 800 1995-02 Scrambler 400 1998-12 Scrambler 500 1994-99 Sport 400L 1993-96 Sportsman 2008-10 Sportsman 300 1997-14 Sportsman 400 2006-25 Sportsman 450 1996-13 Sportsman 500 2014-25 Sportsman 570 2003-05 Sportsman 600 2002-08 Sportsman 700 2005-14 Sportsman 800 1990-97 Trail Blazer 250 2008-13 Trail Blazer 330 2003 Trail Blazer 400 1989-01 Trail Boss 1988-95 Trail Boss 250 2005-13 Trail Boss 330 1990-92 Trail Boss 350L 1999 Worker 335 1999-01 Worker 500 1995-99 Xplorer 300 1996-02 Xplorer 400 1997 Xplorer 500 1996-99 Xpress 300 1996-97 Xpress 400 Series 10 Ranger Series 11 Ranger