This set of 12 Supertech Performance exhaust valves is engineered for the Nissan RB26 engine, providing the thermal resilience required for high-output turbocharged builds. Manufactured from Inconel, a nickel-based superalloy, these valves are designed to withstand the extreme exhaust gas temperatures (EGTs) common in forced induction applications that exceed the limits of standard stainless steel.

Featuring a +1mm oversize head diameter, these valves are intended for competition use and require appropriate valve seat machining. Each valve is precision-ground to strict tolerances to ensure a reliable seal and optimal gas flow across the cylinder head. These are an essential upgrade for builders seeking to improve valvetrain durability under high-boost conditions.

• Engine Fitment: Nissan RB26
• Valve Type: Exhaust
• Material: Inconel Superalloy
• Head Diameter: 31.15mm (+1mm Oversize)
• Stem Diameter: 6.94mm
• Overall Length: 101.20mm
• Quantity: Set of 12
• Manufacturer Part Number: NEVI-1032-7-12

Engineered for high-heat, high-pressure environments, this set of 12 Supertech Inconel exhaust valves is specifically designed for the Nissan RB26 engine. These valves are manufactured from a nickel-based superalloy (Inconel), providing the thermal stability required for turbocharged applications where exhaust gas temperatures can exceed the limits of standard stainless steel.

• Fits Nissan RB26 engines
• Material: Inconel (Nickel-based superalloy)
• Head Diameter: 30.15mm
• Stem Diameter: 6.94mm
• Overall Length: 101.60mm
• Quantity: Set of 12 valves
• Manufacturer Part Number: NEVI-1030-7-12

Supertech exhaust valves are precision-machined to ensure consistent flow and reliable seating, making them an essential upgrade for high-horsepower RB26 builds or standard rebuilds requiring superior heat resistance.

Fits Nissan VG30DE and VG30DET engines.

These Supertech performance exhaust valves are engineered specifically for high-stress applications such as turbocharging or high-compression builds. Manufactured from Inconel 751, a nickel-based superalloy, these valves are designed to maintain structural integrity and resist oxidation in extreme heat environments where standard stainless steel might fail.

This set features a +0.5mm oversize head diameter, providing increased surface area for optimized flow characteristics when combined with appropriate cylinder head machining. These are a direct high-performance replacement for worn or standard OE valves in the VG30 platform.

• Material: Inconel 751 Nickel-Base Superalloy
• Valve Type: Exhaust
• Head Diameter: +0.5mm Oversize
• Quantity: Set of 12 valves
• Manufacturer Part Number: NEVI-1017-12

Engineered for high-performance builds, this set of Supertech Inconel exhaust valves is designed to withstand the extreme thermal loads of forced induction or high-RPM Nissan KA24DE engines. Unlike standard stainless steel, the Inconel 751 Nickel-base alloy maintains its structural integrity and resists oxidation at the elevated exhaust gas temperatures (EGTs) common in turbocharged applications.

• Material: Inconel 751 alloy for maximum heat resistance
• Specification: +0.7mm Oversize head diameter
• Quantity: Set of 8 valves
• Compatibility: Fits Nissan 240SX (KA24DE)
• Part Number: NEVI-1011-8

The +0.7mm oversize head increases surface area for improved flow and heat dissipation. Please note that installing oversized valves requires professional cylinder head machining to properly seat the valves. These components are essential for builders seeking reliable valvetrain performance in demanding KA24DE environments.

Engineered for high-performance Nissan SR20DET builds, these Supertech +1mm oversized exhaust valves provide the thermal stability and flow capacity required for high-boost, high-horsepower applications. Fabricated from a high-nickel Inconel alloy, these valves are specifically designed to resist the extreme heat and oxidation found in turbocharged exhaust paths, preventing the fatigue failure points common with standard stainless steel in racing environments.

This set of eight valves features a 31.15mm head diameter, offering an increase in flow over stock dimensions for improved cylinder scavenging. Each valve is precision-machined to ensure consistent tolerances and long-term reliability under heavy load.

• Material: High-nickel Inconel Alloy
• Head Diameter: 31.15mm (+1mm Oversize)
• Stem Diameter: 6.94mm
• Overall Length: 102.40mm
• Quantity: Set of 8
• Part Number: NEVI-1007-7-8

Engineered for the high thermal demands of forced induction, this set of eight Supertech Inconel exhaust valves is a critical upgrade for the Nissan SR20DET engine. Unlike standard stainless steel, the nickel-based Inconel superalloy provides exceptional resistance to heat, oxidation, and fatigue, ensuring structural integrity in high-boost or endurance racing applications.

• Engine Application: Nissan SR20DET
• Material: Inconel Superalloy
• Head Diameter: 30.15mm
• Stem Diameter: 6.94mm
• Overall Length: 102.40mm
• Quantity: Set of 8 Exhaust Valves
• Manufacturer Part Number: NEVI-1005-7-8

Each valve is precision-machined to exact tolerances, providing superior sealing and durability for performance-built SR20DET cylinder heads requiring maximum heat resistance.

Fits Mitsubishi Lancer Evolution X models equipped with the 4B11 turbocharged engine.

This set of eight Supertech intake valves is engineered for high-output 4B11 builds requiring increased volumetric efficiency. These +1mm oversize valves provide a larger surface area to maximize airflow through the intake ports, making them an essential component for ported cylinder heads and high-boost applications. Note that oversize valves require professional machining of the valve seats for proper fitment and sealing.

Each valve is treated with a specialized black nitriding process. This treatment creates a hard, smooth surface that significantly reduces friction within the valve guides and provides superior resistance to the extreme heat generated by forced induction. The result is improved valvetrain longevity and more consistent performance at high RPMs.

• Manufacturer Part Number: MIVN-1019-8
• Quantity: Set of 8 intake valves
• Head Diameter: +1mm Oversize
• Material/Finish: Black Nitrided for heat and friction resistance
• Application: Mitsubishi 4B11 (EVO X)

Fits Mitsubishi Lancer Evolution X models equipped with the 4B11 engine.

These Supertech intake valves feature a black nitrided finish designed to enhance surface hardness and significantly reduce friction within the valvetrain. Ideal for high-performance 4B11 builds, the nitriding process provides a smoother surface for improved airflow and increased durability under extreme thermal loads. Each valve in this set of 8 is manufactured to precise tolerances to ensure consistent performance and longevity in high-RPM and turbocharged applications.

• Manufacturer Part Number: MIVN-1017-8
• Valve Type: Intake
• Surface Treatment: Black Nitrided
• Engine Compatibility: Mitsubishi 4B11
• Quantity: Set of 8

Fits 1991-1999 Mitsubishi 3000GT and Dodge Stealth models equipped with the 6G72 engine.

These Supertech Performance intake valves are engineered for high-output 6G72 builds where increased volumetric efficiency and valvetrain durability are paramount. The +1mm oversize head diameter (34.00mm) provides significantly more flow potential than the factory valves, making them an essential upgrade for forced induction or high-RPM naturally aspirated setups. Note that installing oversize valves requires professional machining of the cylinder head valve seats.

Each valve is manufactured from high-grade stainless steel and undergoes a black nitriding process. This treatment creates a hardened surface (approx. 52 HRc) that reduces friction against the valve guides and resists the corrosive effects of modern high-octane and leaded fuels. The smooth finish also minimizes carbon buildup on the valve face, maintaining port flow over time.

• Head Diameter: 34.00mm (+1.00mm over stock)
• Stem Diameter: 5.97mm
• Length: 104.10mm
• Material: Black Nitrided Stainless Steel
• Quantity: Set of 12 intake valves
• Manufacturer Part Number: MIVN-1012-12

This set of eight Supertech black nitrided intake valves is engineered for the Mitsubishi 4G63 and 4G63T engines. Designed for high-performance builds requiring professional headwork, these +1mm oversize valves provide the increased surface area necessary to maximize airflow in ported cylinder heads.

Supertech utilizes a specialized black nitriding process that hardens the valve surface and reduces friction against the valve guide. This treatment improves thermal stability and wear resistance, making these valves ideal for high-boost and high-RPM applications where standard components may fail. The precision-machined stems ensure consistent tolerances for reliable valvetrain geometry.

• Fits Mitsubishi 4G63 and 4G63T engines (Lancer Evolution and DSM models)
• Valve Type: Intake
• Sizing: +1mm Oversize (requires machining)
• Finish: Black Nitrided for superior hardness and low friction
• Quantity: Set of 8
• Manufacturer Part Number: MIVN-1009-8

Note: Oversize valves require a professional multi-angle valve job and cylinder head machining for proper fitment and sealing.

Strengthen your valvetrain for high-RPM reliability and increased boost with this set of eight Supertech Black Nitrided Intake Valves. Specifically engineered for the Mitsubishi 4G63 and 4G63T 2.0L 16V engines, these valves are designed to survive the thermal and mechanical stresses of high-performance applications.

Supertech uses a specialized black nitriding process to create a hardened surface layer. This treatment results in a smoother finish than standard chrome plating, which significantly reduces friction against the valve guides and improves overall durability. Whether you are rebuilding a street-driven 4G63 or a dedicated track Lancer Evolution, these valves provide the precise tolerances and heat resistance required for consistent sealing and performance.

• Fits Mitsubishi 4G63 and 4G63T (2.0L 16V) engines
• Black nitrided finish for reduced friction and increased surface hardness
• Designed for high-performance and turbocharged environments
• Valve Type: Intake
• Quantity: Set of 8 valves
• Manufacturer Part Number: MIVN-1007-8

Engineered for high-performance builds, this set of 8 Supertech exhaust valves is designed specifically for the Mitsubishi 4G63 engine. Featuring a +1mm oversize diameter, these valves are an essential upgrade for builders looking to increase flow capacity and maximize exhaust gas evacuation in high-horsepower or forced induction applications.

• Manufacturer Part Number: MEVN-1009-8
• Engine Fitment: Mitsubishi 4G63
• Valve Type: Exhaust
• Size: +1mm Oversize
• Surface Treatment: Black Nitrided for reduced friction and increased surface hardness
• Quantity: Complete set of 8

Each valve undergoes a black nitriding process that creates a smooth, hard finish to improve wear resistance within the valve guide and withstand the extreme thermal loads found in turbocharged racing engines. These valves are designed to provide the precision tolerances and durability required for reliable operation at high RPMs.

Designed for the high-thermal demands of the Mitsubishi 4G63 and 4G63T engines, this set of 8 Supertech exhaust valves provides the durability required for high-performance forced induction builds. These valves are engineered to replace worn OE components with a material and finish optimized for modern tuning environments.

Each valve undergoes Supertech's specialized black nitriding process. This treatment creates a hardened surface layer that significantly reduces friction within the valve guide and improves heat dissipation. Unlike traditional chrome-plated valves, the nitrided finish is smoother and more resistant to the corrosive effects of modern fuels and high exhaust gas temperatures.

• Fits Mitsubishi 4G63 and 4G63T (2.0L) engines
• Valve Type: Exhaust
• Surface Treatment: Black Nitrided for reduced friction and increased hardness
• Quantity: Set of 8
• Manufacturer Part Number: MEVN-1007-8

Fits 2008-2015 Mitsubishi Lancer Evolution X (4B11).

Engineered for the extreme thermal loads found in high-performance forced induction builds, these Supertech Inconel exhaust valves are a critical upgrade for the Mitsubishi 4B11 engine. Unlike standard valves that can degrade under high exhaust gas temperatures (EGTs), these units are forged from a nickel-based superalloy (Inconel) designed specifically for superior heat resistance and structural integrity.

The +1mm oversize head diameter increases exhaust flow capacity and improves cylinder scavenging, supporting higher horsepower targets. Installation of these oversize valves requires professional cylinder head machining to ensure proper valve seat geometry and sealing.

• Manufacturer Part Number: MEVI-1019-8
• Material: High-strength Inconel superalloy
• Head Diameter: +1.00mm Oversize
• Valve Type: Exhaust
• Quantity: Set of 8 valves

Engineered for high-stress turbo applications, this set of eight Supertech Inconel exhaust valves provides the thermal stability required for the Mitsubishi 4B11 2.0L DOHC engine. These valves are specifically designed to withstand the extreme exhaust gas temperatures common in high-performance and forced induction builds, preventing valve fatigue and maintaining a reliable seal under extreme cylinder pressures.

• Engine Compatibility: Mitsubishi 4B11 Turbo DOHC (2.0L)
• Material: High-strength Inconel alloy for superior heat resistance on the exhaust side
• Valve Type: Exhaust
• Quantity: Set of 8
• Manufacturer Part Number: MEVI-1017-8

Fits Mitsubishi 3000GT models equipped with the 6G72 and 6G72T engines. These Supertech +1mm oversize exhaust valves are engineered to withstand the extreme thermal loads found in high-performance and turbocharged applications. Manufactured from Inconel, a specialized nickel-base superalloy, these valves maintain structural integrity at temperatures that exceed the limits of standard stainless steel.

The +1mm oversize head diameter provides increased surface area to optimize exhaust gas flow, though it requires precision machine work to enlarge the factory valve seats. Each valve is forged and subjected to a multi-step heat treatment process to ensure maximum durability and a perfect seal under high-stress conditions.

• Material: High-temperature Inconel alloy
• Head Diameter: +1mm oversize
• Engine Compatibility: Mitsubishi 6G72 and 6G72T
• Quantity: Full set of 12 exhaust valves
• Manufacturer Part Number: MEVI-1012-12

Designed to withstand the extreme thermal loads found in high-boost Mitsubishi 4G63 and 4G63T engines, this set of 8 Supertech Inconel exhaust valves provides the high-temperature stability required for competitive motorsport and high-performance street builds. Using an Inconel 751 nickel-based alloy, these valves are engineered for superior heat resistance compared to standard stainless steel, preventing head deformation and failure under intense exhaust gas temperatures.

These +1mm oversize valves are designed to optimize flow through the exhaust ports. Please note that installing oversized valves requires professional machine work to enlarge the factory valve seats. This set is a direct performance upgrade for built cylinder heads in Mitsubishi Evo I-IX and DSM platforms.

• Material: Inconel 751 Nickel-based alloy for extreme heat resistance
• Head Diameter: +1mm oversize for increased flow
• Application: Mitsubishi 2.0L 4G63 / 4G63T engines
• Quantity: Complete set of 8 exhaust valves
• Manufacturer Part Number: MEVI-1009-8

Designed for the high-thermal demands of the Mitsubishi 4G63 and 4G63T engines, this set of eight Supertech exhaust valves is engineered to withstand extreme combustion temperatures. These valves are a critical upgrade for high-boost, turbocharged builds where standard stainless steel components often reach their thermal limits.

Supertech utilizes a specialized Inconel super-alloy for these exhaust valves, providing exceptional resistance to oxidation and maintaining structural integrity under intense heat. This material choice is specifically intended for performance applications that see elevated EGTs (Exhaust Gas Temperatures), ensuring long-term reliability in competition and street-performance environments.

• Engine Fitment: Mitsubishi 4G63 and 4G63T
• Material: Inconel Super-Alloy
• Application: Exhaust Side
• Quantity: Set of 8 Valves
• Manufacturer Part Number: MEVI-1007-8

Fits 2011+ Mini Cooper R56 models equipped with N18B16A and N18B16C engines.

Designed for high-performance and high-stress environments, these Supertech intake valves are an essential upgrade for the N18 power plant. Each valve is precision-machined and features a specialized black nitriding treatment. This process creates a hardened surface that significantly reduces friction against the valve guides, improving thermal conductivity and extending the life of your valvetrain components.

• Advanced black nitrided finish for superior surface hardness
• Reduced stem friction for improved guide longevity
• Built to withstand the increased heat and pressure of turbocharged applications
• Compatible with factory and aftermarket valve seals
• Quantity: Set of 8 intake valves
• Manufacturer Part Number: MCIVN-1301S-8

Fits Mini Cooper R56 models equipped with N14B16A and N14B16C engines.

Supertech Black Nitrided intake valves are engineered to withstand the thermal and mechanical stresses of high-performance N14 engines. These valves undergo a specialized nitriding process that hardens the surface, providing a significant increase in wear resistance compared to standard chrome-plated valves. This treatment also results in a smoother finish that reduces friction within the valve guides and helps prevent carbon buildup for more consistent airflow.

• Black Nitrided finish for superior hardness and reduced friction
• Designed to handle high-RPM and forced induction applications
• Precision-machined for optimal sealing and reliability
• Full set of eight (8) intake valves included
• Manufacturer Part Number: MCIVN-1200S-8

Designed for the extreme thermal demands of high-performance and forced induction BMW B48 and B58 engines, these Supertech exhaust valves provide the heat resistance and cooling capacity required for reliable power. Each valve is manufactured from Inconel, a nickel-chromium-based superalloy that maintains structural integrity at temperatures where standard stainless steel would fail.

• Sodium Filled: Internal sodium cavities melt at high temperatures, physically carrying heat away from the valve head and through the stem to the guides for superior cooling.
• Inconel Construction: High-nickel alloy specifically chosen for the exhaust side to prevent deformation or melting under heavy boost or lean conditions.
• Single Groove: Designed for use with single-groove valve keepers (collets) to provide more secure clamping at high RPM.
• MPN: MCEVI-1400S-HS-12

This is a complete set of 12 exhaust valves, engineered to replace worn or under-performing OE units in performance-built BMW B48 and B58 cylinder heads.

Fits Mini Cooper models equipped with N14B16 and N18B16 engines. These Supertech exhaust valves are engineered specifically for the extreme thermal environments found in high-performance turbocharged applications. Manufactured from Inconel, a specialized nickel-based superalloy, these valves maintain high tensile strength and resist oxidation at temperatures that would compromise standard stainless steel.

These valves feature a sodium-filled stem design, which provides a critical cooling mechanism by transferring heat away from the valve head through the stem and into the valve guide. This +0.8mm oversized set is ideal for cylinder heads with modified valve seats, offering increased surface area and improved flow characteristics for high-output N14 and N18 builds.

• Material: Inconel Superalloy for extreme heat resistance
• Feature: Sodium-filled stem for superior thermal dissipation
• Size: +0.8mm Oversize (OS)
• Engine Compatibility: N14B16 / N18B16
• Manufacturer Part Number: MCEVI-1202-HS-8
• Quantity: Set of 8 valves

Fits Mini Cooper models equipped with the N14B16 and N18B16 engines. This set of eight Supertech exhaust valves provides critical thermal management for high-performance and turbocharged Mini powerplants.

These valves are manufactured from Inconel, a nickel-based superalloy specifically chosen for its ability to maintain structural integrity at extreme exhaust gas temperatures. To further protect the valvetrain during high-boost or sustained high-RPM conditions, these valves feature a sodium-filled hollow stem. As the valve operates, the liquid sodium transfers heat rapidly away from the valve face to the stem and through the valve guides, significantly lowering operating temperatures and reducing the risk of detonation or valve failure compared to traditional solid-stem components.

• Material: Inconel Superalloy
• Design: Sodium-filled hollow stem for superior heat dissipation
• Application: Exhaust side
• Engine Compatibility: N14B16 and N18B16
• Quantity: Set of 8 valves
• Manufacturer Part Number: MCEVI-1200-HS-8

Fits Mazda and Ford Duratec 2.0L and 2.3L engines.

This set of 8 Supertech performance intake valves is engineered for engine builders looking to maximize airflow in Mazda and Ford Duratec cylinder heads. These valves feature a +1mm oversize diameter, making them an ideal choice for high-horsepower builds where the valve seats are being machined for a larger surface area. Each valve undergoes a Black Nitriding process, which creates a micro-smooth surface to significantly reduce friction against the valve guide and increase surface hardness for superior wear resistance.

• Part Type: Intake Valve
• Sizing: +1mm Oversize
• Material/Finish: Black Nitrided
• Quantity: Set of 8
• Engine Compatibility: Mazda/Ford Duratec (2.0L / 2.3L)
• Manufacturer Part Number: MAIVN-2304F-8

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

These Supertech intake valves are engineered for high-performance builds requiring improved volumetric efficiency and durability. Each valve undergoes a black nitriding process, which creates a smooth, hard surface finish that reduces friction in the valve guides and provides superior resistance to heat and wear. The +1mm oversize diameter allows for increased airflow, making these valves an ideal choice for ported cylinder heads and high-RPM applications.

• Precision machined for Mazda and Ford Duratec 2.0L and 2.3L engines
• Black Nitrided treatment for increased surface hardness and lubrication
• +1mm oversize head diameter for enhanced intake flow
• Designed to withstand the rigors of high-compression and forced induction setups
• Includes a full set of 8 intake valves
• Manufacturer Part Number: MAIVN-2304D-8

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

This set of 8 Supertech intake valves is engineered for high-performance engine builds that demand superior durability and heat management. Each valve undergoes a specialized black nitriding process, which creates a micro-hardened surface layer. This treatment significantly reduces friction against the valve guides and provides better wear resistance compared to traditional chrome-plated valves, making them an ideal choice for forced induction or high-RPM naturally aspirated applications.

• Manufacturer Part Number: MAIVN-2301F-8
• Application: Mazda/Ford Duratec 2.0L and 2.3L engines
• Valve Type: Intake
• Finish: Black Nitrided for reduced friction and increased surface hardness
• Quantity: Set of 8 valves

Fits Mazda and Ford Duratec 2.0L and 2.3L engines.

These Supertech intake valves are engineered for high-performance builds where reliability and valvetrain efficiency are critical. Each valve undergoes a black nitriding process, which significantly increases surface hardness and creates a smoother finish compared to traditional chrome plating. This treatment reduces friction within the valve guides and improves heat resistance, making them an essential upgrade for high-revving or forced induction Duratec engines.

• Manufacturer Part Number: MAIVN-2301D-6MM-8
• Quantity: Set of 8 intake valves
• Stem Diameter: 6mm
• Finish: Black Nitrided for reduced friction and increased surface hardness
• Engine Compatibility: Mazda/Ford Duratec (2.0L / 2.3L)
• Application: Performance replacement for OE intake valves

Fits select 1.8L Mazda Miata models.

Engineered for high-performance cylinder head builds, this set of eight Supertech Black Nitrided intake valves (MPN: MAIVN-1208-8) provides superior durability over standard chrome-plated components. The specialized nitriding process creates a hardened surface that significantly reduces friction in the valve guide while improving thermal transfer and resistance to corrosion and wear at high RPMs.

• Position: Intake
• Surface Treatment: Black Nitrided for reduced friction and increased hardness
• Quantity: Set of 8 valves
• Engine Compatibility: Mazda 1.8L
• Manufacturer Part Number: MAIVN-1208-8

Fits 1.8L Mazda Miata engines.

This set of 8 Supertech intake valves is engineered for high-performance Mazda Miata 1.8L builds that require increased airflow capacity. These valves feature a +1mm oversize head diameter, making them the ideal choice for cylinder heads with modified valve seats. Each valve undergoes a specialized Black Nitriding process, creating a hardened micro-surface that reduces friction against the valve guides and provides superior resistance to heat and wear during high-RPM operation.

• Manufacturer Part Number: MAIVN-1206-8
• Valve Type: Intake
• Head Diameter: +1mm Oversize
• Material Treatment: Black Nitrided for hardness and reduced friction
• Application: Specifically for 1.8L engines
• Quantity: Set of 8 valves

Fits 1.8L Mazda Miata engines.

These Supertech Black Nitrided intake valves are precision-engineered for high-performance 1.8L BP-series engines. By utilizing a specialized black nitriding treatment, Supertech increases the surface hardness of the valve, resulting in significantly reduced friction within the valve guides and improved wear resistance compared to traditional chrome-plated valves.

Designed to withstand the increased thermal and mechanical stresses of modified engines, these valves are a staple for reliable high-RPM or forced induction builds. The smooth surface finish also aids in preventing carbon buildup, maintaining optimal airflow over the life of the engine. This complete set provides all eight intake valves required for a full cylinder head refresh.

• Manufacturer Part Number: MAIVN-1204-8
• Surface Treatment: Black Nitride
• Quantity: Set of 8 Intake Valves
• Application: Mazda 1.8L Engines