Trick Flow 1.5 Ratio 3/8 SBC Aluminum Roller Rocker 

Rocker Arm, 1.5 Ratio, 3/8 in. Stud, Full Roller Design, Aluminum, For Chevy 5.0/5.7L engines, Set of 16 Trick Flow® aluminum roller rocker arms are excellent for use with stock and aftermarket cylinder heads. The rocker arms feature heat-treated CNC-machined bodies, premium needle-bearing fulcrums, roller tips, and a machined relief for improved valve spring clearance. Trick Flow® roller rockers come complete with polylocks.
Part Number: TFS-31400512 Product Line: Trick Flow Roller Rocker Arm Rocker Arm Mounting Style: Stud Self-Aligning: No Rocker Arm Ratio: 1.5 Maximum Spring Diameter (in.): 1.500 in. Rocker Arm Style: Full roller Stud Size: 3/8 in. Shims Included: No Rocker Arm Material: Aluminum Rocker Arm Body Style: Narrow Rocker Arm Fasteners Included: Yes Rocker Arm Nut Style: Polylock Slot Width (in.): 0.550 in. Rocker Arm Finish: Black anodized Quantity: Sold individually.