This listing is for a brand new set of 2.02" diameter stainless steel intake valves and 1.6" diameter stainless steel exhaust in +0.100" longer than stock length. Set includes 8 intake Valves and 8 exhaust valves. These are compatible replacements for many 1955-1993 small block Chevy 302, 307, 327, 350 and 400 V8 cylinder heads and also could fit many cast iron and aluminum aftermarket heads depending on the head diameter and length you need for your application. Valve Specifications - Intake: Head Diameter: 2.020" Swirl polished head with undercut stem. Valve Length: 5.025" Tip length: 0.250" Stem Diameter: 0.3415" (11/32") Valve Specifications - Exhaust: Head Diameter: 1.6" Swirl polished head with undercut stem. Valve Length: 5.025" Tip length: 0.250" Stem Diameter: 0.3415" (11/32") Both are made of Forged one piece 21-4N stainless with hardened stellite tip Chrome plated fully machined stem with undercut stems & 1 Groove. Lock Style: Single Groove