Crower 73643NS-8 Features:

Crower 73643NS-8 Enduro stainless roller rocker arms for Chevy 262-400 V8 engines, 1.7 ratio, half-set of 8. Fits heavy-duty 7/16 in. studs and is supplied without Sure-Lock rocker nuts, indicated by the NS designation. Manufactured from 17-4PH stainless steel with 1025 heat treating for strength and long service life under high-load valvetrain use. Features oversized needle bearings and alloy steel tip rollers to reduce valvetrain friction and support accurate valve action at high RPM.

Rocker Arms Chevy 262-400 1.7 Ratio 7/16 In. Stud Features:

• 1.7:1 ratio roller rockers for Chevy 262-400 V8, 7/16 in. stud fitment, 8-piece half-set for precise valvetrain geometry and stable high-rpm operation.
• 17-4PH stainless steel construction with 1025 heat treating for heavy-load strength, wear resistance, and extended service life in performance applications.
• Oversized needle bearings and alloy steel tip rollers help reduce valvetrain friction, support smoother motion, and promote longer valve spring life.
• Lightweight, high-clearance body design fits large-diameter valve springs up to 1.560 in., ideal for high-lift Small Block Chevy engine builds.
• NS version supplied without rocker nuts, delivering Enduro-style rollerized performance for racing and street-strip valvetrain upgrades.