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The Intake Valve Set was returned by a customer. The Valve Set is still brand new, un-opened & un-used. The Set is 100% complete.

SALE Supertech Intake Valve Standard Set For Honda / Acura K20A2 K20A3 K20A4 K24A2

Part # HIVN-1020D-8

Supertech Fitment

Acura K20A2 / K20A3 / K20A4
Acura K24A2
Honda K20A2 / K20A3 / K20A4 / K20Z1 / K20Z3
Honda K24A2

Supertech Features

EV8 / 21-4N stainless steel base material for high-temperature strength
Black Nitride surface treatment for reduced friction and wear resistance
Precision-ground 5.48mm stem and dished face for optimal sealing
Swirl-polished underhead for improved intake flow
35.00mm head diameter, compatible with standard valve guides and seats
Single Groove lock groove design for secure retention

Supertech Specs

Material: stainless steel 21-4n
Undercut Stem: yes
Back-Cut: yes
Coating: black nitride
Valve Type: one piece forged (non-magnetic)
Groove Type: single groove
Multi-Stage Heat Treatments & Stress Relieving: yes
Valve Length: 108.85mm
Valve Face Type: dished
Valve Size: standard
Length: 108.85mm
Stem Diameter: 5.48mm
Head Diameter: 35.00mm (std) dish
Hardened Wafer Tip: yes
Finish: superfinish - 66% smoother surface than a regular valve

STAINLESS STEEL BLACK NITRIDE INTAKE VALVES for Honda K20A2 / K20A3 / K20A4 / K20Z1 / K20Z3

Supertech's Black Nitride intake valves for the Honda K20A2 / K20A3 / K20A4 / K20Z1 / K20Z3 are manufactured from premium EV8 (21-4N) stainless steel and finished with a proprietary Black Nitride surface treatment. This coating provides superior hardness, reduced friction, and enhanced corrosion resistance compared to standard stainless valves.

Each valve is precision-machined to OEM tolerances and undergoes rigorous quality control including dimensional inspection, hardness testing, and surface finish verification. The result is a valve that delivers consistent, reliable performance in both street and competition Honda K20A2 / K20A3 / K20A4 / K20Z1 / K20Z3 builds.

APPLICATIONS

Ideal for naturally aspirated, turbocharged, and supercharged Honda K20A2 / K20A3 / K20A4 / K20Z1 / K20Z3 builds where reliable high-RPM airflow is critical. The swirl-polished intake valve improves flow while the Black Nitride surface resists wear in demanding builds.