5mm shorter than 1997-2003 bolts. Torque to yield bolts are good for 1 use on engine. Kit contains enough bolts for 1 cylinder head. 2 kits required per engine.
NOTE:IMPORTANT!! LS Series engines produced prior to January 2004 forward have a longer head bolt design. Order P/N 12498545 for engines produced prior to January 2004.
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