Supertech Intake & Exhaust Valves for 1986-1989 Acura Integra D16A1 & D16A9 DOHC ZC Engines

Intake & Exhaust Valves for 1986-1989 Acura Integra D16A1 & D16A9 DOHC ZC EnginesIntake ValvesHIVN-1005D Head Diam: 30.5mm (+0.5mm) Stem Diam: 6.57mm Length: 105.40mmMaterial: Black Nitride Groove Type: Single Groove Valve Type: Intake Quantity: 8 Exhaust ValvesHEVN-1005D Head Diam: 27.5mm (+0.5mm) Stem Diam: 6.45mm Length: 105.80mm Material: Black NitrideGroove Type: Single Groove Valve Type: Exhaust Quantity: 8 *Complete Set of 8 Intake and 8 Exhaust Valves* 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 bl