Features: 1.Cylinder head fasteners are made from aircraft quality 8740 high tensile strength chromoly steel and cold?forged to ensure molecular integrity for maximum durability. 2.This premium quality cylinder head stud kit features with anti?rust, wear resistance and lightweight. 3.Heat?treated prior to thread rolling and machining and are rated at a whopping 190,000 psi. 4.All kits come complete with 12 point nuts and hardened parallel washers for an even load distribution and accurate torque readings. 5.Original standard, direct replacement for old or broken one. Fits for Chevy LS1 LS6 4.8L 5.3L 6.0L 6.2L 2004?2018. Specification: Condition: 100% Brand New_x000D_ Item Type: Cylinder Head Stud Kit _x000D_ Color: As Pictures Shown_x000D_ Fastener Style: Stud_x000D_ Undercut Stud: Yes_x000D_ Head Style: 12-Point_x000D_ Fastener Material: 8740 Chromoly_x000D_ Fastener Finish: Black Oxide_x000D_ Washers Included: Yes_x000D_ Fitment:_x000D_ Fit for Chevy LS1 LS6 4.8L 5.3L 6.0L 6.2L 2004-2018 PackageList: 30 x Screw30 x Nut30 x Gasket