Crower 73683NS-8 Features:

Crower Enduro Centerline roller rocker set for Big Block Chevy 396-454 engines, part number 73683NS-8 1.7 ratio design with .050 in. backset trunnion helps correct valvetrain geometry with .100 in. longer valves Premium heat-treated stainless steel body with alloy steel tip rollers and full-roller construction for reduced friction Fits 7/16 in. studs and accommodates valve spring diameters up to 1.650 in. for compatible BBC valvetrain setups

Centerline Rockers Chevy 396-454 1.7 Ratio .050 In. Backset Features:

• 1.7 ratio roller rockers for BBC 396-454, optimized for .100 in. longer valves with .050 in. backset trunnion geometry correction
• Heat-treated stainless steel body with alloy steel tip rollers, full-roller design for reduced friction and improved high-rpm stability
• 7/16 in. stud fitment with centerline tip alignment at half-lift, helping reduce valve guide wear and maintain accurate valve timing
• Compatible with valve springs up to 1.650 in. OD, engineered for precise valvetrain alignment and smoother high-performance operation
• No sure-locks included, ideal for custom valvetrain setups requiring Big Block Chevy 396-454 1.7 ratio centerline rockers