LIFTER VALLEY VENTS CHEV SB 1/4npt

Allstar's Chevy Small Block Lifter Valley Vents positively vent the crankcase and eliminate oil drain-through and windage losses. When used with valley screens, vents prevent damage from broken valvetrain components. Vents have 1/4in NPT threads and a 9/16in hex head to ease installation. Set of 8.