ARP

For Use With Ford Big Block 429/ 460 cid; Edelbrock Heads 60669/ 60079/ 61669/ 61649; Hex Style Head Type; 180000 Pounds Per Square Inch Tensile Strength; Black Oxide; Chrome Moly; With Washers

12 Millimeter x 1.5 Inch Thread Size; 2.750 Inch Under Head Length; 0.335 Inch Knurl Length

For Use With All V8 Chevy; 12 Point Head Type; Black Oxide; Chrome Moly

Chrome Moly

For Use With 9 Inch Ford Housing; 1.645 Inch Under Head Length; 3/8 Inch - 24 Thread Size; Black Oxide; Chrome Moly

General Replacement; 220000 PSI Tensile Strength; Polished; ARP2000 Steel; Set of 8

For Use With 2.2L GM Ecotec; 12 Point Nuts With Undercut Studs; Black Oxide; Chrome Moly

For Use With Gen III/ LS Series Chevy Small Block; 1.075 Inch Under Head Length; 11 Millimeter x 1.5 Thread Strength; 200000 PSI Tensile Strength

For Use With General Motors; 0.590 Inch Under Head Length; 10 Millimeter x 1.5 Thread Size; With Washers

For Use With Chevrolet V6 And V8 Engines; 3/8 Inch Diameter; 1.375 Inch Length; Black Oxide; Chrome Moly With 12 Point Heads

For Use With Chevrolet V6 And V8 Engines; 3/8 Inch Diameter; 1.375 Inch Length; Black Oxide; Chrome Moly With Standard Hex Heads

For Use With General Motors; 0.590 Inch Under Head Length; 10 Millimeter x 1.5 Thread Size; With Washers