Supertech Exhaust Valves for 1990-1993 Mazda Miata 1.6L B6 Engines

Exhaust Valves for 1990-1993 Mazda Miata 1.6L B6 EnginesMAEVN-1100Head Diam: 26.20mm (STD) Stem Diam: 5.94mm Length: 105.35mm Material: Black Nitride Groove Type: Single Groove Valve Type: ExhaustMAEVN-1102Head Diam: 27.20mm (+1mm) Stem Diam: 5.94mm Length: 105.35mm Material: Black Nitride Groove Type: Single Groove Valve Type: Exhaust*Single Valves Are Also Available In The Drop Down Menu Below* Our stainless steel intake valves are manufactured from an enhanced version of EV8 (21-4N) steel. We have chosen this material specifically because it’s the highest grade of steel available and provides the strength to withstand just about any application. Our exhaust valves are made from EV16 (21-8N) or EV8-Nb/w for even greater strength at higher temperatures. Our stainless steel valves are one piece forged valves, and depending on the application feature hardened tips, hardened seats, swirl polish, undercut, and our black nitride coating. Our black nitride coated valves feature a harder sur