This GM Cylinder Head Bolt Kit for 2004+ LS1/LS2/LS6/LS3/LS7 Gen III or IV does one bank only, so two sets are required for one engine.
These engines use torque-to-yield bolts, so head bolts cannot be reused.
Technical Notes: Gen III engines produced from January 2004 forward have a short style head bolt design. Use #12498545 for engines produced from 1997-2003.
