New-Z28-Springs-1-72-Intake-1-5-Exhaust-Valve-Set-Chevy-400-350-327-305-283 (8) 1.72" Steel intake valves with chrome plated stems. (8) 1.5" Steel 1.5" exhaust valves with chrome plated stems. (16) Stock diameter Z28 style valve springs (16) Hardened 7 valve spring retainers. Spring Type: Single with damper (32) Hardened 7 valve locks.