BCrane Cams 99164-1 Needle Bearing Cam Button Spacer for Chevrolet V8 ReviewbP PP Crane Cams 99164-1 Needle Bearing Cam Button Spacer for Chevrolet V8 PUsed for engines without a cam thrust plate when using a roller lifter camshaft to limit lateral movementPUnique needle bearing button reduces friction and delivers extra "free" horsepowerP