Ensure precise oil control in your cylinder head with this set of 8 Supertech intake valve stem seals. Manufactured from high-grade polyacrylic, these seals are specifically engineered to withstand the thermal demands and vacuum conditions of the intake tract in Honda LS and Mitsubishi engines utilizing 6.6mm valve stems.

• Fits Honda LS and Mitsubishi engines with 6.6mm diameter intake valve stems
• Material: Polyacrylic for reliable heat resistance and oil sealing
• Special Feature: Reduced outer diameter design to provide critical clearance for high-performance dual valve spring assemblies
• Position: Intake
• Quantity: Set of 8
• Manufacturer Part Number: VS-H6.6I-8

Designed for high-performance engine builds, this set of eight Supertech exhaust valve stem seals is engineered for Honda LS and Mitsubishi applications. These seals are manufactured from high-quality Viton, a material chosen for its exceptional resistance to the extreme temperatures and chemical environments found within the cylinder head.

These specific seals feature a reduced outer diameter, making them an essential choice for builds utilizing high-performance dual valve springs or smaller diameter spring packages where clearance is a critical factor. By maintaining a tight seal around the valve stem, they prevent oil from entering the combustion chamber, ensuring cleaner combustion and protecting your engine from carbon buildup and oil consumption.

• Fits Honda LS and select Mitsubishi engines
• Material: High-temperature Viton
• Type: Exhaust valve stem seals
• Stem Diameter: 6.6mm
• Design: Reduced outer diameter for valve spring clearance
• Quantity: Set of 8 seals
• Manufacturer Part Number: VS-H6.6E-8

Ensure precise oil control in your cylinder head with this set of Supertech intake valve stem seals. Specifically designed for Honda engines utilizing 5.5mm valve stems, these seals provide a critical barrier that prevents oil from leaking down the valve guides and into the combustion chamber.

Constructed from high-grade polyacrylic material, these seals are engineered to withstand the extreme temperatures and chemical exposure found in high-performance engines. Unlike standard rubber seals, these offer superior durability and resistance to degradation over time, making them a necessary component for both performance builds and routine engine refreshes.

• Part Type: Intake Valve Stem Seal
• Stem Diameter: 5.5mm
• Material: Polyacrylic
• Quantity: Set of 8
• Manufacturer Part Number: VS-H5.5I-8

Maintain precise oil control and protect your engine's combustion chamber with this set of Supertech Viton exhaust valve stem seals. Engineered specifically for Honda engines utilizing 5.5mm valve stems, these seals are a critical upgrade for both high-performance builds and standard valvetrain refreshes.

Constructed from high-grade Viton, these seals offer superior heat resistance compared to standard rubber compounds, ensuring they remain pliable and effective under the extreme temperatures found at the exhaust port. This durability prevents oil from migrating down the valve guides, which reduces blue smoke and minimizes carbon buildup on the valve tulip.

• Manufacturer Part Number: VS-H5.5E-8
• Material: High-temperature Viton
• Valve Stem Diameter: 5.5mm
• Application: Exhaust valves
• Quantity: Set of 8 seals

Fits the Toyota GR Corolla equipped with the G16E-GTS engine. This set of six Supertech intake valves is engineered to handle the increased thermal and mechanical stresses of high-performance turbocharged applications. Each valve undergoes a black nitriding process, which significantly increases surface hardness and reduces friction against the valve guide, ensuring improved durability and valvetrain efficiency.

Precision-machined to exacting tolerances, these intake valves provide a superior seal and consistent airflow for G16E-GTS cylinder heads. Whether you are performing a standard refresh or a high-horsepower build, these nitrided valves offer the reliability required for intensive street and track use.

• Manufacturer Part Number: TIVN-2033-6
• Engine Compatibility: Toyota G16E-GTS
• Valve Type: Intake
• Head Diameter: 32.8mm
• Stem Diameter: 5.48mm
• Overall Length: 113.6mm
• Finish: Black Nitrided
• Quantity: Set of 6

Fits Toyota 5VZ-FE (3.4L V6) engines.

Supertech Black Nitrided intake valves are engineered to improve valvetrain durability and performance in the Toyota 3.4L V6 engine. The specialized nitriding process creates a hard, smooth surface finish that significantly reduces friction within the valve guides and offers superior resistance to wear and corrosion compared to standard valves. These components are an essential upgrade for high-mileage rebuilds or performance applications where increased heat and RPM are expected.

• Engine Application: Toyota 5VZ-FE (3.4L V6)
• Valve Type: Intake
• Material Treatment: Black Nitrided
• Quantity: Set of 12 valves
• Manufacturer Part Number: TIVN-1040-12

Fits Toyota 4AGE 16V engines.

This set of eight Supertech intake valves is engineered to handle the thermal and mechanical stresses of high-performance Toyota 4AGE 16V cylinder heads. Each valve features a specialized black nitriding treatment, a process that creates a harder surface and a smoother finish compared to traditional chrome plating. This surface hardening significantly reduces friction within the valve guides and improves overall wear resistance, making them a critical upgrade for high-revving builds and engines seeing increased combustion temperatures.

• Manufacturer Part Number: TIVN-1019-8
• Valve Type: Intake
• Quantity: Set of 8
• Finish: Black Nitrided for superior hardness and reduced friction
• Application: Toyota 4AGE 16-valve engines
• Designed for high-RPM reliability and improved heat dissipation

Fits Toyota Supra models equipped with the 3.0L 2JZ engine.

Engineered for high-performance and competition builds, this set of Supertech intake valves is designed to improve airflow and withstand the extreme thermal loads of high-horsepower 2JZ-GTE and 2JZ-GE platforms. Each valve features a black nitriding treatment, a proprietary hardening process that provides a smoother surface finish and reduces friction within the valve guide for superior wear resistance at high RPMs.

These valves are +1mm oversized, requiring appropriate cylinder head machining to accommodate the larger diameter. The increased surface area allows for significantly higher volumetric efficiency, making them an essential upgrade for turbocharged builds seeking maximum flow. Constructed from high-tensile stainless steel, they offer the structural integrity needed for forced induction and high-compression applications.

• Part Type: Intake Valve
• Material: Black Nitrided Stainless Steel
• Sizing: +1mm Oversize
• Quantity: Set of 12
• Manufacturer Part Number: TIVN-1016-12

Fits Toyota Supra models equipped with the 2JZ engine.

This set of 12 Supertech intake valves is engineered to withstand the thermal and mechanical stresses of high-performance Toyota 2JZ cylinder heads. Each valve undergoes a specialized black nitriding process, which creates a micro-hardened surface layer. This treatment significantly reduces friction within the valve guide and provides superior resistance to wear and corrosion compared to standard untreated valves.

• Manufacturer Part Number: TIVN-1014-12
• Engine Compatibility: Toyota 2JZ-GE / 2JZ-GTE
• Surface Treatment: Black Nitrided for increased hardness and lubricity
• Quantity: Set of 12 intake valves
• Construction: Designed for high-RPM stability and improved heat dissipation

Ideal for both naturally aspirated and forced induction builds, these valves offer the dimensional precision and durability required for reliable valvetrain operation in high-horsepower 2JZ applications.

Fits Toyota models equipped with the 1JZ-GTE engine.

This set of 12 Supertech Performance intake valves is engineered for the high-thermal loads and high-RPM demands of performance 1JZ-GTE builds. Each valve features a specialized black nitriding process, which creates a hardened surface layer that significantly reduces friction against the valve guide and provides superior resistance to oxidation. These precision-machined valves offer the structural integrity needed for forced induction applications where valvetrain reliability is paramount.

• Engineered specifically for Toyota 1JZ-GTE cylinder heads
• Black Nitrided finish for increased surface hardness and wear resistance
• Low-friction design improves valvetrain efficiency and guide life
• Includes a complete set of 12 intake valves
• Manufacturer Part Number: TIVN-1008-12

Fits Toyota 4A-GE 16V engines.

Upgrade your cylinder head with this set of eight Supertech Black Nitrided exhaust valves. Engineered to handle the increased thermal loads and high-RPM demands of performance builds, these valves are an essential upgrade for both high-output naturally aspirated and turbocharged 4A-GE configurations.

Supertech uses a specialized nitriding process to create a hard, smooth surface finish that significantly reduces friction within the valve guide while providing excellent heat dissipation. This treatment increases the surface hardness of the stainless steel, offering superior resistance to wear and seat erosion compared to standard components.

• Engineered for Toyota 4A-GE 16-valve cylinder heads
• Black Nitrided surface treatment for reduced friction and increased hardness
• Enhanced heat resistance for high-performance applications
• Complete set of 8 exhaust valves
• Manufacturer Part Number: TEVN-1020-8

Fits Toyota 4AGE 16-valve engines.

This set of eight Supertech exhaust valves is engineered to withstand the extreme thermal and mechanical stresses of high-performance and racing applications. Each valve undergoes a specialized black nitriding process, which significantly increases surface hardness and creates a smoother finish. This treatment reduces friction within the valve guides and improves overall wear resistance, making them an essential upgrade for high-RPM builds.

• Engineered specifically for the Toyota 4AGE 16V cylinder head
• Black Nitrided surface treatment for reduced friction and increased durability
• Precision-machined to exacting tolerances for optimal sealing and flow
• Complete set of 8 exhaust valves
• Manufacturer Part Number: TEVN-1019-8

Upgrade your G16E-GTS valvetrain with this set of Supertech Inconel exhaust valves, specifically engineered for the high-temperature environments of turbocharged Toyota GR Corolla engines. Inconel is a nickel-based superalloy that provides superior heat resistance and structural integrity compared to standard stainless steel, making it the preferred choice for high-performance exhaust applications where thermal loads are extreme.

These valves are manufactured to exacting tolerances to ensure consistent sealing and reliable operation under high-boost conditions. This complete set of six valves replaces your factory components with race-grade hardware capable of withstanding the rigors of track use and increased power levels.

• Engine Application: Toyota G16E-GTS
• Material: Inconel (High-Heat Superalloy)
• Head Diameter: 32.00mm
• Stem Diameter: 5.48mm
• Overall Length: 117.10mm
• Quantity: Set of 6
• Manufacturer Part Number: TEVI-2033-HS-6

Fits Toyota 2JZ engines.

This set of 12 Supertech +1mm oversize exhaust valves is engineered for high-performance Toyota 2JZ builds where extreme exhaust gas temperatures (EGTs) are a constant factor. Manufactured from Inconel 751, a nickel-based superalloy, these valves provide superior heat resistance and structural integrity compared to standard stainless steel, making them essential for high-boost turbocharged applications.

The +1mm head diameter increases the effective valve area to improve exhaust flow and scavenging. Note that professional cylinder head machining and oversized valve seats are required for proper installation. Each valve is precision-ground to maintain strict tolerances for optimal sealing under high cylinder pressures.

• Manufacturer Part Number: TEVI-1016-12
• Material: Inconel 751 Nickel-Base Alloy
• Head Diameter: +1mm Oversize
• Application: Toyota 2JZ Exhaust Side
• Quantity: Set of 12 Valves

Fits Toyota Supra models equipped with the 2JZ-GTE engine. These Supertech Inconel exhaust valves are specifically engineered for high-performance applications where extreme heat and exhaust gas temperatures (EGTs) are a constant factor.

Built to withstand the rigors of high-boost turbocharged setups, these valves utilize Inconel 751, a nickel-base alloy known for its exceptional strength and heat resistance. This material ensures that the valves maintain their structural integrity and seat properly even under intense thermal stress that would cause standard stainless steel valves to fail.

• Material: Inconel 751 Nickel-Base Alloy
• Engine Compatibility: Toyota 2JZ-GTE
• Application: Exhaust Side
• Quantity: Full Set of 12 Valves
• Manufacturer Part Number: TEVI-1014-12

Engineered for high-performance Toyota 1JZ-GTE engines, this set of 12 Supertech exhaust valves (TEVI-1008-12) provides the thermal stability required for aggressive turbocharged applications. These valves are manufactured from Inconel 751, a nickel-based superalloy specifically chosen for its exceptional strength and oxidation resistance at extreme temperatures.

Unlike standard stainless steel valves that may fatigue under high exhaust gas temperatures (EGTs), these Inconel units are designed to withstand the heat generated by increased boost levels, anti-lag systems, and sustained high-RPM operation. Each valve is precision-machined to ensure consistent tolerances and a reliable seal for optimal cylinder compression.

• Material: Inconel 751 Superalloy
• Application: Toyota 1JZ-GTE engines
• Quantity: Full set of 12 exhaust valves
• MPN: TEVI-1008-12
• Ideal for high-boost, forced induction, and nitrous-equipped builds

This Supertech valve spring shim (SS-3043) is precision-engineered for professional engine builders who require exact valvetrain tolerances. By providing a stable, flat base for the valve spring, this shim allows for precise adjustment of the installed height, ensuring consistent seat pressure across all cylinders.

Manufactured from high-quality materials to resist wear and fatigue under high-RPM conditions, these shims are essential for correcting head machining variations or achieving specific spring tension requirements. This component is designed to fit over the valve guide while maintaining a secure seat within the spring pocket.

• Manufacturer Part Number: SS-3043
• Outside Diameter (OD): 1.140in
• Inside Diameter (ID): .570in
• Thickness: .030in

Designed for high-performance builds, the Supertech Performance Dual Valve Spring Kit for the Volkswagen VR6 12V engine provides the increased seat pressure and harmonic damping required for high-lift camshafts and high-RPM operation.

This dual-spring configuration helps prevent valve float, ensuring the valvetrain remains stable under extreme conditions. Each kit is engineered to exacting tolerances, replacing the factory single-spring setup with a more robust solution for street, strip, or track applications.

• Engineered for Volkswagen 12V VR6 powerplants
• Dual spring design for improved valvetrain control and harmonic damping
• Essential for high-lift camshaft profiles
• Protects against valve float at high RPMs
• Complete set for the 12-valve cylinder head
• Manufacturer Part Number: SPRK-V2093-4-12

Engineered for high-performance valvetrains, the Supertech SPRK-TS1015-SU5 Dual Valve Spring Kit provides the critical seat pressure and harmonic damping required for high-RPM Subaru EJ25 builds. This dual-spring configuration is specifically designed to prevent valve float, ensuring the valvetrain remains stable and responsive when using aggressive camshaft profiles or high-boost setups.

By utilizing a secondary inner spring, this kit offers superior control over valve motion compared to factory single-spring arrangements. These components are manufactured from high-tensile chrome silicon steel to ensure long-term durability and resistance to fatigue in demanding racing environments.

• Fits Subaru Impreza models equipped with the EJ25 engine.
• Design: Dual valve spring configuration for improved harmonic control.
• Function: Prevents valve float at high engine speeds.
• Material: High-quality chrome silicon steel.
• Manufacturer Part Number: SPRK-TS1015-SU5

Fits Subaru WRX and STi models with 16V EJ-series engines.

The Supertech SPRK-TS1015-SU4 Dual Valve Spring Kit is engineered to provide the valvetrain stability required for high-performance Subaru builds. By utilizing a dual-spring design, this kit effectively dampens harmonics and provides the necessary seat and open pressures to prevent valve float at high RPM or under high-boost conditions. These springs are manufactured from high-tensile chrome silicon steel, heat-treated, and stress-relieved to maintain consistent tension over their service life.

• Prevents valve float and manages valvetrain harmonics at high engine speeds
• Designed to accommodate high-lift camshafts and aggressive ramp rates
• Material: High-tensile chrome silicon steel alloy
• Configuration: 16V Dual Valve Spring Set
• Manufacturer Part Number: SPRK-TS1015-SU4

Engineered for high-performance Subaru WRX and STI 16-valve engines, the Supertech SPRK-TS1015-SU1 dual valve spring kit provides the high-RPM stability required for aggressive cam profiles and increased boost levels. These dual springs are designed to reduce harmonic resonance and prevent valve float, ensuring the valvetrain remains controlled under extreme racing conditions.

This kit replaces factory springs to offer higher seat pressure and greater lift capacity, making it a critical upgrade for builds targeting higher redlines or utilizing aftermarket camshafts. Each component is manufactured to strict tolerances to ensure consistent spring rates across the entire set.

• Part Number: SPRK-TS1015-SU1
• Engine Compatibility: Subaru 16V (EJ-series)
• Spring Type: Dual Valve Spring
• Application: High-performance street and track use
• Designed to prevent valve float at high RPMs

This Supertech Dual Valve Spring Kit is specifically engineered for Nissan RB25 DOHC 24V engines utilizing a solid lifter valvetrain. Designed to maintain valvetrain stability and prevent valve float, this kit is an essential upgrade for high-RPM builds and forced induction applications where factory springs lack the necessary tension to control heavier valves or aggressive cam profiles.

The dual-spring configuration provides increased seat pressure and improved harmonic damping compared to single-spring setups. By optimizing the spring rates for solid lifter conversions, Supertech ensures reliable performance and helps protect your engine components during high-performance driving or competition use.

• Fits Nissan RB25 DOHC 24V engines equipped with solid lifters
• Dual-spring design for superior high-RPM stability and valve control
• Increased seat pressure to prevent valve float under high boost or lift
• Precision-manufactured for consistent spring rates and durability
• Manufacturer Part Number: SPRK-TS1015-RB25

Fits Toyota 2JZ engines.

The Supertech SPRK-TS1015 Dual Valve Spring Kit is a critical valvetrain upgrade for high-performance Toyota 2JZ builds. Engineered to handle the increased demands of aggressive camshaft profiles and high boost pressures, this dual spring kit helps prevent valve float at high RPMs, ensuring consistent timing and valvetrain stability.

• Designed specifically for the Toyota 2JZ platform
• Dual spring configuration provides increased seat pressure and lift capacity over OE
• Reduces the risk of coil bind and valve-to-piston contact in high-lift applications
• Essential for high-revving street, drag, or track engines
• Manufacturer Part Number: SPRK-TS1015

Fits 2005-2015 Ford Focus (2.0L).

The Supertech SPRK-TS-DUR-D2 dual valve spring kit is designed to provide the increased seat pressure and high-RPM stability required for performance engine builds. This kit helps eliminate valve float, a common failure point when introducing aggressive camshaft profiles or increased boost levels in the Focus 2.0L engine. By utilizing a dual-spring design, Supertech ensures a higher natural frequency and improved dampening to maintain precise valvetrain control under extreme racing conditions.

• Prevents valve float at high engine speeds
• Increases valvetrain reliability for forced induction or high-lift cam applications
• Precision-manufactured for consistent spring rates
• Manufacturer Part Number: SPRK-TS-DUR-D2

Ensure valvetrain stability at high RPMs with the Supertech Dual Valve Spring Kit for Ford Duratec and Mazda MZR engines. Designed to support aggressive camshaft profiles and forced induction setups, this kit provides the necessary seat pressure to prevent valve float and maintain precise engine timing during high-performance use.

Engineered for the 2.0L, 2.3L, and 2.5L powerplants, these dual springs offer superior harmonic dampening compared to single-spring configurations. By utilizing a dual-coil architecture, this kit provides an added layer of safety; the secondary spring helps prevent the valve from dropping into the combustion chamber in the event of a primary spring failure.

• Compatible with Ford Duratec and Mazda MZR 2.0L, 2.3L, and 2.5L engines
• Designed for high-lift camshafts and increased redline applications
• Reduces harmonic resonance and improves valvetrain durability
• Manufacturer Part Number: SPRK-TS-DUR-D1

Ensure reliable valvetrain stability and prevent valve float in your high-performance Volkswagen 24-valve VR6 or R32 engine with the Supertech Dual Valve Spring Kit. This kit (MPN: SPRK-TC25D-VR6) is engineered for modified engines running aggressive camshaft profiles or higher RPM limits than the factory configuration.

Each spring is manufactured from high-quality chrome silicon steel to provide consistent seat pressure and long-term fatigue resistance. The included titanium retainers are precision-machined to reduce reciprocating mass compared to OEM steel components, allowing for faster valvetrain response and improved engine harmonics at high speeds.

• Fits Volkswagen 24V VR6 and R32 engines.
• Includes high-performance dual valve springs and lightweight titanium retainers.
• Manufactured from premium chrome silicon steel for durability and heat resistance.
• Designed to support high-lift camshafts and elevated RPM ranges.
• Manufacturer Part Number: SPRK-TC25D-VR6

Enhance your engine's reliability and performance with the Supertech Mazda Miata Single Valve Spring Kit (1.8L). This kit is specifically designed to provide the necessary tension to prevent valve float, making it a critical upgrade for high-RPM builds and forced induction setups.

By replacing factory components with the Supertech SPRK-MM18-S, you ensure more consistent valve control and valvetrain stability under demanding driving conditions. These springs are engineered to handle the increased stresses of performance driving while maintaining the precise tolerances required for the 1.8L Mazda powerplant.

• Fits 1.8L Mazda Miata engines
• Engineered for increased valvetrain stability at higher RPMs
• Provides critical protection against valve float in performance applications
• Direct replacement for OEM valve springs
• Manufacturer Part Number: SPRK-MM18-S

Fits 1.8L Mazda Miata models.

The Supertech Dual Valve Spring Kit is engineered for high-performance builds requiring superior valve train stability and reliability. Designed to replace the factory single springs, this dual-spring configuration provides the necessary seat pressure and tension to eliminate valve float at high RPMs, ensuring your engine remains protected during aggressive driving or when running forced induction and high-lift camshafts.

Constructed from high-tensile chrome silicon steel, these springs offer excellent harmonic damping and durability. This kit is a direct solution for enthusiasts seeking to maximize the volumetric efficiency of the Mazda 1.8L engine without compromising on component longevity.

• Manufacturer Part Number: SPRK-MM18-D
• Engine Compatibility: Mazda 1.8L
• Spring Configuration: Dual Valve Springs
• Material: High-tensile chrome silicon steel
• Applications: High-RPM, forced induction, and performance cam profiles

Protect your valvetrain against valve float during high-RPM operation with the Supertech Dual Valve Spring Kit for the Mazda Miata (1.6L). This kit provides the necessary seat pressure and harmonic damping to maintain precise valve timing in high-performance applications where factory single springs often reach their mechanical limits.

Manufactured from high-tensile chrome silicon steel, these dual springs are designed to handle the increased loads of aggressive camshaft profiles and elevated boost levels. By utilizing a dual-spring architecture, Supertech reduces the risk of spring resonance and provides a critical safety margin should a single spring fail.

• Fits Mazda Miata (1.6L) engines
• Seat Pressure: 70lbs @ 34.2mm installed height
• Dual spring configuration for superior high-rev stability
• High-quality chrome silicon steel construction
• Manufacturer Part Number: SPRK-MM16D-2

Fits Mazda Miata (1.6L).

The Supertech SPRK-MM16-S single valve spring kit is engineered to provide the increased seat pressure and spring rate required for performance valvetrain setups. Designed specifically for the Mazda Miata 1.6L engine, these springs help prevent valve float at higher RPMs and provide the reliability needed for high-revving street or track applications. Whether you are running aftermarket camshafts or building for high-boost durability, these springs ensure precise valve control.

• Engineered for high-RPM stability and valve control
• Prevents valve float in performance and racing applications
• High-quality materials designed for consistent seat pressure
• Compatible with Mazda Miata 1.6L engines
• Manufacturer Part Number: SPRK-MM16-S