Crower 73685NS-8 Features:

Crower CENTERLINE ROCKERS for Chevy big-block 396-454, part number 73685NS-8, set of 8 stud-mount rocker arms with 1.8 ratio and .050 backset trunnion. Heat-treated stainless steel rocker bodies and alloy steel tip rollers help reduce friction, support valve control, and improve durability in high-rpm valvetrains. .050 backset trunnion offsets the rocker stud hole to restore correct geometry with a .100 long valve for accurate centerline contact at half lift. Corrected valvetrain geometry helps reduce valve guide wear, promote more precise valve timing, and decrease heat for improved valve spring life.

Centerline Rockers Chevy 396-454 1.8 Ratio .050 Backset Trunnion Features:

• Heat-treated stainless steel rocker arms with alloy steel tip rollers, 1.8 ratio, .050 in. backset trunnion for BBC 396-454 applications
• Backset trunnion geometry correction for .100 in. longer valves, optimized centerline contact at half lift, reduced valve guide wear
• Stud-mount roller design reduces friction, supports added horsepower, more accurate valve timing, and improved high-RPM valve control
• Lower operating heat helps extend valve spring life, while reduced contact stress helps protect valve stems and guides under load
• Set of 8 centerline roller rockers, N.S. configuration without sure-locks, built for precise valvetrain alignment and durability