Harland Sharp Original Rocker Arm 7/16" Stud Mount 1.80 Ratio BR30025 They are constructed from

They are constructed from

Breathers sold separately

Swivel Adapter Fitting 10AN To 3/8"NPT Aluminum 90 Degree

Reinforced M6 threaded HANS/HNR inserts are mated to the shell along with an expanded polystyrene (EPS) liner

Harland Sharp Original Rocker Arm 7/16" Stud Mount 1.80 Ratio BR30025 They are constructed fromProduct Description: Rocker Arm Original 7 16 in Stud Mount 1. 80 Ratio Full Roller Aluminum Orange Anodized Big Block Chevy Set of 16 Since the 1950s, Harland Sharp is the leader in roller rocker arm technology. Sharp manufactures roller rockers and rocker components for a variety of applications. Their rockers are made from lightweight aluminum and anodized for increased durability.