Intake & Exhaust Valves for 2006-2011 Honda Civic Si K20Z3 Engines
Intake Valves
HIVN-1020D
Head Diam: 35.00mm (STD)
Stem Diam: 5.48mm
Length: 108.85mm
Material: Black Nitride
Groove Type: Single Groove
Valve Type: Intake
Face Type: Dish
HIVN-1020F
Head Diam: 35.00mm (STD)
Stem Diam: 5.48mm
Length: 108.85mm
Material: Black Nitride
Groove Type: Single Groove
Valve Type: Intake
Face Type: Flat
HIVN-1021D
Head Diam: 35.50mm (+0.5mm)
Stem Diam: 5.48mm
Length: 108.85mm
Material: Black Nitride
Groove Type: Single Groove
Valve Type: Intake
Face Type: Dish
HIVN-1021F
Head Diam: 35.50mm (+0.5mm)
Stem Diam: 5.48mm
Length: 108.85mm
Material: Black Nitride
Groove Type: Single Groove
Valve Type: Intake
Face Type: Flat
HIVN-1022D
Head Diam: 36.00mm (+1.0mm)
Stem Diam: 5.48mm
Length: 108.85mm
Material: Black Nitride
Groove Type: Single Groove
Valve Type: Intake
Face Type: Dish
HIVN-1022F
Head Diam: 36.00mm (+1.0mm)
Stem Diam: 5.48mm
Length: 108.85mm
Material: Black Nitride
Groove Type: Single Groove
Valve Type: Intake
Face Type: Flat
HIVN-1022.5F
Head Diam: 36.50mm (+1.5mm)
Stem Diam: 5.48mm
Length: 108.85mm
Material: Black Nitride
Groove Type: Single Groove
Valve Type: Intake
Face Type: Flat
HIVN-1023F
Head Diam: 37.00mm (+2.0mm)
Stem Diam: 5.48mm
Length: 108.85mm
Material: Black Nitride
Groove Type: Single Groove
Valve Type: Intake
Face Type: Flat
Exhaust Valves
HEVN-1020D
Head Diam: 30.00mm (STD)
Stem Diam: 5.45mm
Length: 108.65mm
Material: Black Nitride
Groove Type: Single Groove
Valve Type: Exhaust
Face Type: Dish
HEVN-1020F
Head Diam: 30.00mm (STD)
Stem Diam: 5.45mm
Length: 108.65mm
Material: Black Nitride
Groove Type: Single Groove
Valve Type: Exhaust
Face Type: Flat
HEVI-1020D
Head Diam: 30.00mm (STD)
Stem Diam: 5.45mm
Length: 108.65mm
Material: Inconel
Groove Type: Single Groove
Valve Type: Exhaust
Face Type: Dish
HEVN-1021D
Head Diam: 30.50mm (+0.5mm)
Stem Diam: 5.45mm
Length: 108.65mm
Material: Black Nitride
Groove Type: Single Groove
Valve Type: Exhaust
Face Type: Dish
HEVN-1021F
Head Diam: 30.50mm (+0.5mm)
Stem Diam: 5.45mm
Length: 108.65mm
Material: Black Nitride
Groove Type: Single Groove
Valve Type: Exhaust
Face Type: Flat
HEVI-1021D
Head Diam: 30.50mm (+0.5mm)
Stem Diam: 5.45mm
Length: 108.65mm
Material: Inconel
Groove Type: Single Groove
Valve Type: Exhaust
Face Type: Dish
HEVN-1030D
Head Diam: 31.00mm (+1.0mm)
Stem Diam: 5.45mm
Length: 108.80mm
Material: Black Nitride
Groove Type: Single Groove
Valve Type: Exhaust
Face Type: Dish
HEVN-1030F
Head Diam: 31.00mm (+1.0mm)
Stem Diam: 5.45mm
Length: 108.80mm
Material: Black Nitride
Groove Type: Single Groove
Valve Type: Exhaust
Face Type: Flat
HEVI-1030D
Head Diam: 31.00mm (+1.0mm)
Stem Diam: 5.45mm
Length: 108.80mm
Material: Inconel
Groove Type: Single Groove
Valve Type: Exhaust
Face Type: Dish
HEVN-1033F
Head Diam: 31.50mm (+1.5mm)
Stem Diam: 5.45mm
Length: 108.80mm
Material: Black Nitride
Groove Type: Single Groove
Valve Type: Exhaust
Face Type: Flat
HEVI-1033D
Head Diam: 31.50mm (+1.5mm)
Stem Diam: 5.45mm
Length: 108.80mm
Material: Inconel
Groove Type: Single Groove
Valve Type: Exhaust
Face Type: Dish
*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.
Supertech manufactures a variety of high performance Inconel valves for many applications. These valves are manufactured from a Nickel base super alloy material (Inconel 751 or Nimonic 80A) this material is chosen because it is designed to withstand very high temperatures. These valves feature a one-piece forging, hardened tip, and our “superfinish” stem. Our Inconel valves are extremely popular choice for turbo and supercharged applications.
Intake Valves
HIVN-1020D
Head Diam: 35.00mm (STD)
Stem Diam: 5.48mm
Length: 108.85mm
Material: Black Nitride
Groove Type: Single Groove
Valve Type: Intake
Face Type: Dish
HIVN-1020F
Head Diam: 35.00mm (STD)
Stem Diam: 5.48mm
Length: 108.85mm
Material: Black Nitride
Groove Type: Single Groove
Valve Type: Intake
Face Type: Flat
HIVN-1021D
Head Diam: 35.50mm (+0.5mm)
Stem Diam: 5.48mm
Length: 108.85mm
Material: Black Nitride
Groove Type: Single Groove
Valve Type: Intake
Face Type: Dish
HIVN-1021F
Head Diam: 35.50mm (+0.5mm)
Stem Diam: 5.48mm
Length: 108.85mm
Material: Black Nitride
Groove Type: Single Groove
Valve Type: Intake
Face Type: Flat
HIVN-1022D
Head Diam: 36.00mm (+1.0mm)
Stem Diam: 5.48mm
Length: 108.85mm
Material: Black Nitride
Groove Type: Single Groove
Valve Type: Intake
Face Type: Dish
HIVN-1022F
Head Diam: 36.00mm (+1.0mm)
Stem Diam: 5.48mm
Length: 108.85mm
Material: Black Nitride
Groove Type: Single Groove
Valve Type: Intake
Face Type: Flat
HIVN-1022.5F
Head Diam: 36.50mm (+1.5mm)
Stem Diam: 5.48mm
Length: 108.85mm
Material: Black Nitride
Groove Type: Single Groove
Valve Type: Intake
Face Type: Flat
HIVN-1023F
Head Diam: 37.00mm (+2.0mm)
Stem Diam: 5.48mm
Length: 108.85mm
Material: Black Nitride
Groove Type: Single Groove
Valve Type: Intake
Face Type: Flat
Exhaust Valves
HEVN-1020D
Head Diam: 30.00mm (STD)
Stem Diam: 5.45mm
Length: 108.65mm
Material: Black Nitride
Groove Type: Single Groove
Valve Type: Exhaust
Face Type: Dish
HEVN-1020F
Head Diam: 30.00mm (STD)
Stem Diam: 5.45mm
Length: 108.65mm
Material: Black Nitride
Groove Type: Single Groove
Valve Type: Exhaust
Face Type: Flat
HEVI-1020D
Head Diam: 30.00mm (STD)
Stem Diam: 5.45mm
Length: 108.65mm
Material: Inconel
Groove Type: Single Groove
Valve Type: Exhaust
Face Type: Dish
HEVN-1021D
Head Diam: 30.50mm (+0.5mm)
Stem Diam: 5.45mm
Length: 108.65mm
Material: Black Nitride
Groove Type: Single Groove
Valve Type: Exhaust
Face Type: Dish
HEVN-1021F
Head Diam: 30.50mm (+0.5mm)
Stem Diam: 5.45mm
Length: 108.65mm
Material: Black Nitride
Groove Type: Single Groove
Valve Type: Exhaust
Face Type: Flat
HEVI-1021D
Head Diam: 30.50mm (+0.5mm)
Stem Diam: 5.45mm
Length: 108.65mm
Material: Inconel
Groove Type: Single Groove
Valve Type: Exhaust
Face Type: Dish
HEVN-1030D
Head Diam: 31.00mm (+1.0mm)
Stem Diam: 5.45mm
Length: 108.80mm
Material: Black Nitride
Groove Type: Single Groove
Valve Type: Exhaust
Face Type: Dish
HEVN-1030F
Head Diam: 31.00mm (+1.0mm)
Stem Diam: 5.45mm
Length: 108.80mm
Material: Black Nitride
Groove Type: Single Groove
Valve Type: Exhaust
Face Type: Flat
HEVI-1030D
Head Diam: 31.00mm (+1.0mm)
Stem Diam: 5.45mm
Length: 108.80mm
Material: Inconel
Groove Type: Single Groove
Valve Type: Exhaust
Face Type: Dish
HEVN-1033F
Head Diam: 31.50mm (+1.5mm)
Stem Diam: 5.45mm
Length: 108.80mm
Material: Black Nitride
Groove Type: Single Groove
Valve Type: Exhaust
Face Type: Flat
HEVI-1033D
Head Diam: 31.50mm (+1.5mm)
Stem Diam: 5.45mm
Length: 108.80mm
Material: Inconel
Groove Type: Single Groove
Valve Type: Exhaust
Face Type: Dish
*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.
Supertech manufactures a variety of high performance Inconel valves for many applications. These valves are manufactured from a Nickel base super alloy material (Inconel 751 or Nimonic 80A) this material is chosen because it is designed to withstand very high temperatures. These valves feature a one-piece forging, hardened tip, and our “superfinish” stem. Our Inconel valves are extremely popular choice for turbo and supercharged applications.