Intake & Exhaust Valves for 1986-1989 Acura Integra D16A1 & D16A9 DOHC ZC Engines
Intake Valves
HIVN-1005D
Head Diam: 30.5mm (+0.5mm)
Stem Diam: 6.57mm
Length: 105.40mm
Material: Black Nitride
Groove Type: Single Groove
Valve Type: Intake
Quantity: 8
Exhaust Valves
HEVN-1005D
Head Diam: 27.5mm (+0.5mm)
Stem Diam: 6.45mm
Length: 105.80mm
Material: Black Nitride
Groove 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 black nitride coating. Our black nitride coated valves feature a harder surface area and a smoother finish, providing less friction and subsequently longer life.
Intake Valves
HIVN-1005D
Head Diam: 30.5mm (+0.5mm)
Stem Diam: 6.57mm
Length: 105.40mm
Material: Black Nitride
Groove Type: Single Groove
Valve Type: Intake
Quantity: 8
Exhaust Valves
HEVN-1005D
Head Diam: 27.5mm (+0.5mm)
Stem Diam: 6.45mm
Length: 105.80mm
Material: Black Nitride
Groove 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 black nitride coating. Our black nitride coated valves feature a harder surface area and a smoother finish, providing less friction and subsequently longer life.