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Chevy Small Block 4.3L-6.6L/262-400 Cubic Inch; For Use With Edelbrock Performer & Performer RPM Cylinder Heads; Hex Head; Not Undercut; 170000 PSI Tensile Strength; Black Oxide; Chrome Moly; With Washer

Chevy Big Block 6.5L-8.2L/396-502 Cubic Inch; For Use With Edelbrock Performer & Performer RPM Cylinder Heads; Hex Head; Not Undercut; 170000 PSI Tensile Strength; Black Oxide; Chrome Moly; With Washer

Ford Windsor Small Block 4.7L-5.0L/289-302 Cubic Inch; For Use With Stock; Edelbrock Performer & Performer RPM Cylinder Heads; Hex Head; Not Undercut; 170000 PSI Tensile Strength; Black Oxide; Chrome Moly; With Washer

Chrysler LA Small Block 5.2L-5.9L/318-360 Cubic Inch; For Use With Performer RPM & Chrysler 340 Cylinder Head; Hex Head; Not Undercut; 170000 PSI Tensile Strength; Black Oxide; Chrome Moly; With Washer

Ford FE Big Block 6.4L-7.0L/390-428 Cubic Inch; For Use With Performer RPM NHRA Cylinder Head; Hex Head; Not Undercut; 170000 PSI Tensile Strength; Black Oxide; Chrome Moly; With Washer

Chrysler Big Block 5.9L-7.2L/361-440 Cubic Inch; For Use E-Street & Performer RPM Cylinder Head; Hex Head; Not Undercut; 170000 PSI Tensile Strength; Black Oxide; Chrome Moly; With Washer