Fits Mazda Miata models equipped with the 1.8L engine.

Enhance your engine's valvetrain durability and performance with this set of Supertech black nitrided exhaust valves. Specifically engineered for the Mazda Miata 1.8L BP-series engine, these valves are treated with a specialized nitriding process that significantly increases surface hardness and reduces friction. This result is a valve that better resists the high thermal loads of performance driving while minimizing wear on the valve guides.

Whether you are performing a standard cylinder head refresh or building a high-compression or forced induction engine, these valves provide the reliability required for sustained high-RPM operation. The smooth, hardened finish ensures consistent sealing and improved heat dissipation over standard components.

• Manufacturer Part Number: MAEVN-1204-8
• Quantity: Set of 8 Exhaust Valves
• Engine Compatibility: 1.8L
• Finish: Black Nitrided for superior heat resistance and reduced friction
• Application: Direct replacement for Mazda Miata 1.8L engines

Fits Mazda Miata (1.6L).

Ensure your Mazda engine maintains peak performance with this set of eight Supertech exhaust valves. These valves undergo a specialized black nitriding process, which significantly hardens the surface and reduces friction between the stem and the valve guide. This treatment improves heat dissipation and wear resistance, making them a critical upgrade for high-RPM or forced induction builds where thermal stress is a factor.

• Manufacturer Part Number: MAEVN-1100-8
• Finish: Black Nitrided for increased hardness and reduced friction
• Application: Exhaust side
• Quantity: Set of 8 valves
• Engine Fitment: 1.6L B6

Supertech valves are precision-machined to strict tolerances to provide a superior seal and reliable operation in demanding performance conditions.

Fits Mazda and Ford Duratec engines (2.0L / 2.3L).

These Supertech exhaust valves are engineered for extreme-duty applications where standard stainless steel components fail. Manufactured from Inconel, a nickel-based superalloy, these valves offer superior heat resistance for turbocharged, supercharged, or high-compression naturally aspirated engines. The +1mm oversize head diameter improves exhaust flow and scavenging, though it requires professional cylinder head machining for proper seat fitment.

• Material: High-temperature Inconel alloy
• Valve Type: Exhaust
• Sizing: +1mm Oversize
• Engine Application: Mazda/Ford Duratec 2.0L and 2.3L
• Manufacturer Part Number: MAEVI-2304-8
• Quantity: Set of 8 valves

Fits Mazda MZR and Ford Duratec engines (2.0L / 2.3L).

Engineered for the extreme thermal demands of high-performance and forced-induction builds, these Supertech Inconel exhaust valves provide the heat resistance necessary to prevent valve fatigue or failure. Inconel is a nickel-chromium-based superalloy specifically chosen for its ability to maintain high tensile strength and resist oxidation at temperatures that would compromise standard stainless steel valves.

These 6mm stem valves are precision-machined for consistent fitment and improved gas flow. Whether you are rebuilding a high-revving naturally aspirated engine or a high-boost turbo setup, these valves offer the structural integrity and reliability required for competitive use.

• Material: Inconel Superalloy
• Application: Mazda MZR / Ford Duratec 2.0L and 2.3L
• Stem Diameter: 6mm
• Quantity: Set of 8
• Manufacturer Part Number: MAEVI-2301D-6MM-8

Fits 1.8L Mazda Miata engines.

Engineered for high-performance and forced induction builds, this set of eight Supertech exhaust valves is manufactured from Inconel 751. This nickel-base superalloy provides superior resistance to the extreme heat and corrosive environments found in high-horsepower or turbocharged applications. These valves feature a +1mm oversize head diameter to increase flow capacity and improve exhaust scavenging when paired with a matching performance valve job.

• Part Type: Exhaust Valve
• Material: Inconel 751 Superalloy
• Head Diameter: +1mm Oversize
• Quantity: Set of 8
• Engine Fitment: 1.8L
• Manufacturer Part Number: MAEVI-1206-8

Fits Mazda Miata (1.8L) engines.

This set of 8 Supertech Inconel exhaust valves is engineered for high-performance applications where extreme exhaust gas temperatures (EGTs) are a concern. Built to withstand the thermal stresses of turbocharged, supercharged, or heavy-duty track use, Inconel nickel-based superalloys provide superior heat resistance compared to standard stainless steel. These valves ensure consistent sealing and structural integrity under the most demanding combustion conditions.

• Material: Inconel superalloy for maximum heat resistance
• Application: Forced induction or high-performance naturally aspirated builds
• Quantity: Set of 8 exhaust valves
• Precision machined for optimal flow and reliable seating
• Manufacturer Part Number: MAEVI-1204-8

Fits Honda B16A and B18C engines.

This set of eight Supertech intake valves is engineered for the high-revving demands of performance Honda B-series engines. These valves feature a specialized black nitriding treatment, a process that significantly increases surface hardness and creates a smoother finish. This reduces friction between the valve stem and guide while providing superior wear resistance compared to standard chrome-plated valves, making them ideal for high-RPM and forced induction applications.

• Precision-machined for optimized airflow and reliable sealing
• Black Nitrided finish increases surface hardness and reduces friction
• Enhanced thermal and mechanical durability for performance racing
• Replaces factory intake valves in B16A and B18C cylinder heads
• Manufacturer Part Number: HIVN-200F-8
• Quantity: Set of 8 Intake Valves

Fits 2000-2009 Honda S2000 equipped with F20C1 or F22C1 engines.

These Supertech performance intake valves are engineered for high-RPM applications where durability and friction reduction are critical. Each valve undergoes a specialized Black Nitriding process, creating a hardened surface layer that significantly improves wear resistance in the valve guide while reducing stem friction. This treatment results in a smoother surface finish compared to traditional chrome plating, providing better flow and increased longevity under the high heat and stress of performance driving.

• Engine Application: Honda F20C1 / F22C1
• Material: Black Nitrided Stainless Steel
• Increased surface hardness for reduced guide wear
• Designed for high-performance and racing environments
• Manufacturer Part Number: HIVN-1030F-8
• Quantity: Set of 8 intake valves

Fits 2000-2009 Honda S2000 equipped with F20C1 or F22C1 engines.

This set of eight Supertech intake valves is engineered for high-performance Honda F-Series engines that demand superior thermal management and reduced friction. Each valve undergoes a specialized black nitriding process, which creates a surface harder than the base material to significantly reduce wear on the valve stems and guides. This treatment also improves flow by providing a smoother finish than standard chrome plating.

Forged from high-temperature stainless steel, these valves are designed to withstand the stresses of high-RPM operation and aggressive cam profiles. They serve as a direct high-performance replacement for factory intake valves, offering the durability required for both naturally aspirated builds and forced induction applications.

• Manufacturer Part Number: HIVN-1030D-8
• Quantity: Set of 8 intake valves
• Material: Forged stainless steel
• Finish: Black Nitride coating for increased hardness and lubricity
• Engine Compatibility: Honda F20C1, F22C1

Fits Honda K20 and K24 engines.

Supertech Performance intake valves are engineered for high-RPM racing and performance street builds. These valves feature a black nitriding treatment, which creates a smooth, hard surface to reduce friction within the valve guide and increase wear resistance under extreme thermal stress. The nitriding process also provides superior surface hardness compared to standard chrome plating.

The +2mm oversize head diameter is designed for engines requiring maximum volumetric efficiency, typically used in conjunction with extensive cylinder head porting and oversized valve seats. Each valve is precision-machined from high-tensile strength alloys to ensure consistent seat contact and optimal sealing for high-compression or forced induction K-series builds.

• Manufacturer Part Number: HIVN-1023F-8
• Engine Compatibility: Honda K20 / K24
• Valve Type: Intake
• Head Diameter: +2mm Oversize
• Surface Treatment: Black Nitrided
• Quantity: Set of 8

Optimize the flow characteristics of your Honda or Acura K-Series cylinder head with this set of eight Supertech Black Nitrided intake valves. Specifically designed for K20 and K24 engines, these +1mm oversized valves are engineered to provide increased airflow potential, making them a vital upgrade for high-performance builds requiring precision tolerances.

The black nitriding treatment creates a hard, smooth surface that significantly reduces friction in the valve guides and improves overall wear resistance. Designed to handle the stresses of high-RPM operation and aggressive cam profiles, these valves offer superior thermal transfer and longevity compared to standard components.

• Manufacturer Part Number: HIVN-1022F-8
• Application: Honda/Acura K20 and K24 engines
• Valve Type: Intake
• Spec: +1mm Oversize head diameter
• Finish: Black Nitrided for reduced friction and increased surface hardness
• Quantity: Set of 8 valves

Note: These +1mm oversized valves require professional cylinder head machining and valve seat cutting to ensure proper fitment and vacuum sealing.

Designed for high-performance Honda and Acura K-series engines, these Supertech intake valves are engineered to withstand the rigors of high-RPM operation and increased combustion pressures. These valves feature a black nitrided finish, a hardening process that significantly reduces friction and improves wear resistance for a longer valvetrain lifespan.

The +1mm oversize diameter is ideal for builds utilizing ported cylinder heads, allowing for increased airflow and improved volumetric efficiency. These valves are precision-machined to exact tolerances, ensuring a reliable seal and consistent performance in K20 and K24 platforms. Professional installation and valve seat machining are required for oversize applications.

• Fits Honda/Acura K20 and K24 engines
• Manufacturer Part Number: HIVN-1022D-8
• Quantity: Set of 8 intake valves
• Size: +1mm Oversize
• Finish: Black Nitrided for reduced friction and heat resistance

Designed for high-performance Honda K20 and K24 series engines, these Supertech intake valves utilize a specialized black nitriding process to enhance valvetrain longevity and efficiency. Unlike standard finishes, the nitriding treatment increases surface hardness and creates a smoother finish to significantly reduce friction within the valve guide.

These valves are engineered to withstand the thermal and mechanical stresses of high-RPM operation, making them an essential upgrade for both forced induction and high-compression naturally aspirated builds. The precision-machined profiles ensure optimal airflow and a reliable seal against the valve seat.

• Fits Honda K20 and K24 engines
• Black Nitride coating for reduced friction and increased hardness
• Precision-machined for superior fitment and flow
• Engineered for high-performance and racing applications
• Set of 8 intake valves
• Manufacturer Part Number: HIVN-1020F-8

Fits Honda K20 and K24 series engines.

This set of 8 Supertech intake valves (MPN: HIVN-1020D-8) is engineered for high-performance Honda K-series builds. Each valve undergoes a specialized black nitriding process, creating a hardened surface layer that significantly reduces friction and improves wear resistance compared to standard stainless steel valves. This treatment is particularly beneficial for high-RPM applications where valvetrain stability and heat dissipation are critical for engine longevity.

• Engineered specifically for Honda K20 and K24 cylinder heads
• Black Nitrided finish for increased surface hardness and reduced stem-to-guide friction
• Precision machined for consistent flow characteristics and reliable valve seating
• Enhanced durability for high-performance, forced induction, and racing environments
• Manufacturer Part Number: HIVN-1020D-8
• Quantity: Complete set of 8 Intake Valves

Upgrade your cylinder head with this set of 8 Supertech Black Nitrided intake valves, specifically engineered for Honda D-Series engines including the D15B, D16Y, D16Z6, and D17A. These valves are designed to provide superior durability and performance in high-RPM street and track applications.

Supertech utilizes a specialized black nitriding process that hardens the valve surface to significantly reduce friction and increase wear resistance against the valve guides. This treatment results in a micro-smooth finish that helps optimize airflow across the valve head, while the high-strength alloy construction ensures structural stability under elevated operating temperatures and increased cylinder pressures.

• Fits: Honda D15B, D16Y, D16Z6, and D17A engines
• Valve Type: Intake
• Surface Finish: Black Nitride coating for reduced friction
• Construction: High-strength alloy material
• Quantity: Complete set of 8 valves
• Manufacturer Part Number: HIVN-1012-8

Fits Honda B16A, B17A, and B18C engines.

Designed for high-performance builds, these Supertech intake valves feature a specialized black nitriding treatment. This process hardens the valve surface and significantly reduces friction against the valve guide, providing smoother operation and increased durability in high-revving VTEC applications. These valves are engineered to withstand the mechanical and thermal stresses of forced induction or high-compression naturally aspirated setups.

• Black nitrided finish for superior wear resistance and reduced stem friction
• Enhanced surface hardness for longer valvetrain service life
• Designed specifically for Honda B-series cylinder heads
• Optimized for improved airflow and volumetric efficiency
• Manufacturer Part Number: HIVN-100F-8
• Includes: Set of 8 intake valves

Fits Honda B18A and B20 engines.

These Supertech intake valves are engineered for high-performance Honda non-VTEC builds. Each valve undergoes a specialized Black Nitriding process, which significantly reduces friction between the stem and the valve guide while increasing surface hardness for long-term durability. This treatment is essential for engines operating at higher RPMs or under increased thermal loads where valve train wear is a concern.

Constructed to exacting tolerances, these valves ensure consistent seating and optimal airflow for your B-series head. This complete set of eight valves replaces worn OE components with race-grade hardware designed for reliability.

• Manufacturer Part Number: HIVN-1004-0-8
• Head Diameter: 31.00mm
• Stem Diameter: 6.57mm
• Overall Length: 105.40mm
• Finish: Black Nitrided
• Quantity: Set of 8 Intake Valves

Fits Honda B16A and B18C engines.

Supertech Black Nitrided intake valves are engineered for high-performance valvetrains where durability and friction reduction are paramount. These valves undergo a specialized liquid nitriding process that creates a high-hardness surface across the entire component, including the stem and head. This treatment results in a micro-smooth finish that significantly reduces friction within the valve guide while providing superior resistance to wear and corrosion compared to traditional chrome plating.

• Liquid Nitriding process for increased surface hardness and thermal efficiency
• Reduced stem friction for smoother operation at high RPMs
• High-grade stainless steel construction for structural integrity
• Direct fitment for B16A and B18C cylinder heads
• Manufacturer Part Number: HIVN-1000-8

This package contains a complete set of 8 intake valves, ready for installation during your next cylinder head refresh or performance build.

Fits select Honda B16A and B18C VTEC engines.

Enhance your valvetrain durability with this set of 8 Supertech Performance exhaust valves. Specifically engineered for the high-revving nature of Honda B-series engines, these valves are built to withstand the intense thermal loads and mechanical stresses found in both naturally aspirated and forced induction builds.

Each valve undergoes a specialized black nitriding process, which creates a micro-smooth, hardened surface. This treatment significantly reduces friction within the valve guide and provides superior resistance to wear and corrosion compared to untreated stainless steel. The result is improved valvetrain stability and extended service life for your cylinder head.

• Black Nitride coating for increased surface hardness and reduced friction
• Precision CNC-machined for exact tolerances and optimal gas flow
• Designed for high-temperature exhaust environments
• Includes 8 exhaust valves
• Manufacturer Part Number: HEVN-200F-8

Fits Honda K20, F20C1, and F22C1 engines.

Supertech Black Nitrided exhaust valves are engineered for high-performance engine builds that demand increased flow and superior thermal durability. These +1mm oversize valves feature a specialized nitriding process that creates a high-hardness surface layer, significantly reducing friction within the valve guides and enhancing resistance to wear and corrosion under extreme combustion temperatures common in high-RPM and forced induction applications.

• Manufacturer Part Number: HEVN-1030F-8
• Quantity: Set of 8 exhaust valves
• Sizing: +1mm Oversize head diameter
• Finish: Black Nitride treatment for reduced stem friction and improved surface hardness
• Engine Fitment: Honda K20 (2.0L), F20C1 (2.0L), and F22C1 (2.2L)

Optimize your valvetrain for high-performance applications with this set of Supertech Black Nitrided exhaust valves. Designed specifically for Honda/Acura K20 and F20 series engines, these valves are engineered to withstand the extreme thermal loads found in high-RPM and forced induction builds.

The black nitriding process hardens the valve surface and significantly reduces friction against the valve guide, promoting better heat dissipation and improved component longevity. These are standard 31mm head diameter replacements, providing a precision fit for OE-sized valve seats while offering superior metallurgy and durability compared to factory components.

• Manufacturer Part Number: HEVN-1030D-8
• Head Diameter: 31.00mm (Standard)
• Material Treatment: Black Nitrided for reduced friction and increased surface hardness
• Engine Fitment: Honda K20 and F20 series
• Included: Complete set of 8 exhaust valves

Enhance your cylinder head's durability and flow with this set of Supertech Black Nitrided exhaust valves, specifically engineered for Honda K20 and K24 series engines. These valves are built to withstand the rigorous thermal demands of high-performance naturally aspirated or forced induction builds.

Supertech’s black nitriding process involves a specialized hardening treatment that results in a smoother surface finish and increased surface hardness. This significantly reduces friction within the valve guides and improves wear resistance over standard stainless steel components. Each valve is precision-machined to ensure consistent seating and optimal sealing under high-RPM conditions.

• Engine Application: Honda K20 / K24
• Valve Type: Exhaust
• Surface Treatment: Black Nitrided
• Quantity: Full set of 8 valves
• Manufacturer Part Number: HEVN-1020F-8

Engineered for high-performance K-Series builds, this set of 8 Supertech exhaust valves provides the durability and thermal resistance required for high-RPM and forced induction applications. These valves are designed specifically for Honda K20 and K24 cylinder heads, offering a precision-machined upgrade over factory components.

• Fits Honda K20 and K24 engines.
• Black Nitride surface treatment increases micro-hardness and reduces friction for smoother operation within the valve guide.
• Superior heat resistance and improved thermal conductivity to withstand extreme exhaust gas temperatures.
• Compatible with high-performance valvetrain setups, including upgraded springs and retainers.
• Manufacturer Part Number: HEVN-1020D-8

This set includes eight (8) black nitrided exhaust valves, providing a complete replacement for the exhaust side of your 16-valve K-Series engine.

Fits select Honda D-Series engines including D15B, D16Y, D16Z6, and D17A. These Supertech Black Nitrided exhaust valves are engineered for high-performance builds where increased thermal loads and higher RPMs are expected.

By applying a specialized Black Nitride surface treatment, Supertech significantly increases the surface hardness of the valve and reduces friction within the valve guide. This process results in a smoother finish that resists carbon buildup and improves heat dissipation compared to standard chrome-plated valves. Precision-machined from high-tensile stainless steel, these valves ensure long-term reliability under extreme combustion chamber temperatures.

• Manufacturer Part Number: HEVN-1012-8
• Surface Treatment: Black Nitride
• Component Type: Exhaust Valve
• Quantity: Set of 8
• Material: High-tensile stainless steel
• Compatible with factory and aftermarket valve guides

Fits Honda B16A, B17A, and B18C engines.

Improve your engine's valvetrain durability and performance with this set of eight Supertech black nitrided exhaust valves. These precision-machined valves are engineered to withstand the high thermal loads and RPM demands of B-Series powerplants. The black nitriding process hardens the surface and significantly reduces friction against the valve guides, resulting in improved wear resistance and smoother operation compared to non-treated components.

• Manufacturer Part Number: HEVN-100F-8
• Quantity: Set of 8 exhaust valves
• Finish: Black Nitrided for superior surface hardness and reduced friction
• Application: Honda B16A, B17A, and B18C VTEC engines
• Engineered for high-performance and racing applications

Fits Honda H22A1 and H22A4 engines.

Designed for high-performance engine builds, this set of eight Supertech exhaust valves features a specialized black nitriding treatment. This chemical process hardens the valve surface to a micro-level, significantly reducing friction between the valve stem and the guide while providing superior resistance to wear and corrosion. Unlike traditional chrome plating, the nitrided finish is integrated into the material, ensuring it will not flake or peel under the extreme thermal stresses of the exhaust tract.

• Manufacturer Part Number: HEVN-1006F-8
• Quantity: Complete set of 8 exhaust valves
• Finish: Black Nitrided for increased surface hardness and reduced friction
• Application: Specifically engineered for Honda H-series (H22A1/H22A4) cylinder heads
• Benefits: Improved heat dissipation and valve train longevity in high-RPM applications

Fits Honda B18A, B18B, and B20 non-VTEC engines.

Supertech high-performance exhaust valves are engineered to withstand the increased thermal and mechanical stresses of high-output engines. These valves feature a black nitriding treatment, a hardening process that creates a smooth, low-friction surface. This significantly reduces wear on the valve guides and improves overall valvetrain longevity compared to standard finishes.

Each valve is precision CNC-machined to ensure tight tolerances, providing a reliable seal and consistent flow characteristics. This set is a direct performance upgrade for engine builders looking to enhance the reliability of their B-series cylinder head in both street and competition environments.

• Manufacturer Part Number: HEVN-1004-0-8
• Valve Type: Exhaust
• Head Diameter: 28.00mm
• Stem Diameter: 6.55mm
• Total Length: 105.80mm
• Material/Finish: Black Nitrided
• Quantity: Set of 8 valves

Fits Honda B16A and B18C engines.

Engineered for high-performance builds, this Supertech Black Nitride Exhaust Valve set (HEVN-1000-8) provides the durability required for high-RPM and forced induction applications. These valves are manufactured from forged stainless steel to ensure structural integrity under extreme thermal stress and high-heat exhaust environments.

The specialized Black Nitride surface treatment hardens the valve and significantly reduces friction within the valve guide. This process results in a smoother finish than traditional chrome plating, leading to improved heat dissipation and extended valvetrain service life. Each valve is precision-machined and micro-polished to ensure a reliable seat and optimal exhaust gas flow.

• Manufacturer Part Number: HEVN-1000-8
• Material: Forged Stainless Steel
• Surface Treatment: Black Nitride Coating
• Quantity: Set of 8 Exhaust Valves
• Compatibility: Designed for Honda B16A and B18C cylinder heads

Designed for high-performance applications, these Supertech +1mm oversize exhaust valves are specifically engineered for Honda K20, K24, F20C1, and F22C1 engines. Built to withstand the extreme thermal loads found in turbocharged, supercharged, or high-compression racing builds, these valves provide the heat resistance and flow capacity required for maximum power output.

These valves are manufactured from Inconel 751, a nickel-based superalloy that maintains its structural integrity at temperatures where standard stainless steel begins to fail. Each valve is forged, CNC-machined, and features a chrome-plated stem for reduced friction and extended guide life. Note that the +1mm oversize diameter requires professional cylinder head machine work to enlarge the valve seats.

• Manufacturer Part Number: HEVI-1030D-8
• Material: Inconel 751 Superalloy
• Head Diameter: 31.00mm (+1mm Oversize)
• Stem Diameter: 5.48mm
• Length: 108.65mm
• Quantity: Set of 8 Exhaust Valves
• Application: Honda K-Series and F-Series (S2000) engines

Fits Honda K20 series engines.

Engineered for high-performance and high-heat environments, these Supertech exhaust valves are constructed from Inconel, a nickel-base superalloy designed to maintain structural integrity under extreme thermal stress. This makes them an essential upgrade for turbocharged, supercharged, or high-compression naturally aspirated K-series builds where exhaust gas temperatures (EGTs) exceed the limits of standard stainless steel.

These valves feature a chrome finish and a 6mm tapered stem, reducing weight and improving flow characteristics within the exhaust port. Each valve is precision-machined to exact tolerances to ensure a reliable seat and consistent valvetrain performance in demanding racing conditions.

• Brand: Supertech
• Part Number: HEVI-1020D-6MM-8
• Material: Inconel with Chrome Plating
• Head Diameter: 30.00mm
• Stem Diameter: 5.96mm
• Length: 108.65mm
• Stem Type: 6mm Tapered
• Quantity: Set of 8