Ensure superior oil control and long-term durability with this set of Supertech Viton Valve Stem Seals. Designed specifically for the Subaru BRZ and Toyota FRS, these seals are a critical component for any cylinder head refresh or performance engine build.

Standard rubber seals often harden and crack due to extreme heat cycles, leading to oil consumption and blue smoke. Supertech manufactures these seals from high-quality Viton, a fluoroelastomer known for its exceptional resistance to heat and chemicals. This ensures the seal remains flexible and maintains a tight grip on the valve stem, even in high-RPM or forced induction applications.

• Material: High-temperature Viton fluoroelastomer
• Quantity: Set of 8 seals
• Compatibility: Fits Subaru BRZ and Toyota FRS
• Manufacturer Part Number: VS-SU5.5-EI-8

These seals provide the precision fit required to keep oil out of the combustion chamber, preserving power and preventing carbon buildup on your valves during high-performance operation.

Maintain precise oil control in your cylinder head with this set of 8 Supertech Viton valve stem seals. Designed for Nissan engines equipped with 7mm valve stems, these seals are essential for any cylinder head refresh or high-performance engine build. Unlike standard rubber seals that can become brittle over time, Supertech uses a high-grade Viton compound known for its exceptional resistance to extreme heat and synthetic oil additives.

• Manufacturer Part Number: VS-N7E-8
• Material: High-temperature Viton
• Stem Diameter: 7mm
• Quantity: Set of 8
• Fitment: Fits select Nissan engines with 7mm valve stems

Installing these seals helps prevent oil from migrating down the valve guides into the combustion chamber or exhaust path, effectively reducing oil consumption and eliminating the blue smoke often associated with worn-out OEM seals. These VS-N7E-8 seals offer the tight tolerances and durability required for both daily driving and track applications.

Maintain precise oil control and prevent oil consumption with this set of Supertech 7mm Viton valve stem seals. Designed for Nissan applications utilizing a 7mm valve stem, these seals are essential for any cylinder head rebuild, especially in high-performance or forced-induction environments.

Constructed from premium Viton (FKM) fluoropolymer, these seals offer significantly higher heat resistance and durability than standard OEM rubber components. They are engineered to withstand the extreme temperatures of high-RPM operation and the chemical degradation of modern synthetic oils, ensuring a reliable seal against the valve guide to prevent blue smoke and carbon buildup.

• Material: High-temperature Viton (FKM)
• Valve Stem Diameter: 7mm
• Quantity: Set of 12
• Manufacturer Part Number: VS-N7E-12
• Compatible with select Nissan 7mm valve guides

Maintain precise oil control and prevent oil consumption in your cylinder head with this Supertech Intake Valve Stem Seal set. Specifically engineered for engines utilizing 6mm valve stems, these seals provide a tight, durable interface that prevents oil from migrating down the intake guides and into the combustion chamber.

Ideal for performance rebuilds, these seals are designed to withstand the high temperatures and pressures common in turbocharged or high-RPM SR20 and RB26 builds. Replacing worn OE seals with Supertech components ensures cleaner combustion and helps eliminate blue smoke during startup or high-vacuum deceleration.

• Fits Nissan SR20DE, SR20DET, and RB26 engines
• Designed for 6mm valve stem diameters
• Specifically for intake side application
• Set includes 8 individual seals
• Manufacturer Part Number: VS-N6I-8

Fits Nissan SR20DE, SR20DET, and RB26 engines with 6mm valve stems.

These Supertech intake valve stem seals are designed to maintain precise oil control in high-performance Nissan engines. By providing a tight seal against the 6mm valve stem, they prevent engine oil from leaking down the valve guides into the combustion chamber, reducing oil consumption and preventing carbon buildup on intake valves and spark plugs.

• Manufacturer Part Number: VS-N6I-12
• Application: Intake valves
• Stem Diameter: 6mm
• Quantity: Set of 12 seals
• Compatible Engines: Nissan SR20DE, SR20DET, RB26

Each seal is manufactured from high-temperature resistant materials to ensure longevity and reliability under the extreme conditions found in turbocharged and high-revving applications. These are an essential component during a cylinder head rebuild to ensure factory or better-than-factory tolerances.

Designed for select Nissan engines with 6mm valve stems, these Supertech exhaust valve stem seals are an essential upgrade or replacement for worn factory seals.

Manufactured from high-grade Viton, these seals are engineered to withstand the extreme thermal loads found on the exhaust side of the cylinder head. Unlike standard rubber components, Viton maintains its flexibility and sealing integrity under extreme temperature cycles, ensuring precise oil control and preventing oil from migrating down the valve guide into the combustion chamber. These are a direct-fit solution for performance builds or standard refreshes requiring a 6mm stem diameter.

• Manufacturer Part Number: VS-N6E-8
• Material: High-temperature Viton
• Valve Stem Diameter: 6mm
• Valve Position: Exhaust
• Quantity: Set of 8

Maintain precise oil control and protect your combustion chamber with this set of 12 Supertech Viton exhaust valve stem seals. Specifically designed for Nissan engines utilizing 6mm valve stems, these seals are engineered to withstand the extreme thermal loads and chemical environments found on the exhaust side of the cylinder head.

Constructed from high-grade Viton (fluoroelastomer), these seals offer significantly higher heat resistance compared to standard polyacrylate or rubber alternatives. This prevents the seals from hardening and cracking over time, which is a primary cause of oil consumption and blue smoke at startup. Whether you are performing a routine cylinder head refresh or a high-performance build, these seals provide a reliable, long-lasting interface between the valve stem and guide.

• Manufacturer Part Number: VS-N6E-12
• Material: High-temp Viton (FKM)
• Valve Stem Diameter: 6mm
• Application: Exhaust side
• Quantity: Set of 12
• Vehicle Fitment: Select Nissan engines with 6mm valves

Maintain precise oil control and engine efficiency with this set of Supertech valve stem seals. Designed specifically for Nissan engines utilizing 5.5mm valve stems, these seals provide a tight, reliable interface between the valve stem and guide to prevent oil from entering the combustion chamber.

• Manufacturer Part Number: VS-N5.5E-8
• Compatibility: Nissan engines with 5.5mm valve stems
• Quantity: Set of 8 seals
• Engineered for high-heat durability and consistent sealing performance
• Replaces worn or leaking factory valve seals

Ensure precise oil control within your cylinder head with this set of eight Supertech intake valve stem seals. Specifically engineered for Mitsubishi engines utilizing 6.6mm valve stems, these seals are manufactured from high-grade Viton. This material is chosen for its exceptional thermal stability and resistance to chemical degradation, allowing the seals to maintain their elasticity and sealing integrity under the extreme heat of high-performance or turbocharged operation.

These standard (STD) size seals replace worn factory components to prevent oil from leaking down the guide and into the combustion chamber, reducing oil consumption and preventing carbon buildup on the valves. They are designed for a direct fit over the valve guides, providing a consistent wipe on the intake valve stems.

• Application: Select Mitsubishi engines
• Position: Intake valves
• Material: High-temperature Viton
• Valve Stem Diameter: 6.6mm
• Size: Standard (STD)
• Quantity: Set of 8
• Manufacturer Part Number: VS-M6.6I-8

Maintain precise oil control and prevent blue smoke with this set of Supertech exhaust valve stem seals. Specifically engineered for Mitsubishi engines using a 6.6mm valve stem, these seals are a critical component for any cylinder head refresh or high-performance build. Manufactured from high-quality Viton, these seals offer superior heat resistance and durability compared to standard rubber, making them ideal for high-RPM and turbocharged applications where exhaust gas temperatures are elevated.

These standard-size (STD) seals fit the factory valve guides, ensuring a secure seat and reliable operation. By replacing worn or hardened seals with Viton fluoroelastomer versions, you effectively seal the valve guide to keep oil out of the combustion chamber, preventing carbon buildup and maintaining consistent performance.

• Manufacturer Part Number: VS-M6.6E-8
• Material: High-temperature Viton
• Stem Diameter: 6.6mm
• Application: Exhaust valves
• Size: Standard (STD)
• Quantity: Set of 8 seals

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

Ensure consistent oil control and long-term durability in high-performance engine builds with this bulk pack of GSC P-D Viton valve stem seals. Designed for the Subaru EJ series engine platform, these seals are specifically engineered to handle the increased heat cycles and friction found in turbocharged and high-RPM applications where standard rubber components may degrade.

These 6mm seals are molded from premium Viton fluoroelastomer, providing superior resistance to chemical breakdown from synthetic oils and fuels. This professional-grade set of 500 is an ideal solution for engine machine shops and high-volume builders working on Subaru EJ20, EJ22, and EJ25 cylinder heads.

• Fits Subaru EJ Series engines with 6mm valve stems
• Manufactured from high-temperature Viton material
• Maintains a precise seal to prevent oil consumption and carbon buildup
• Bulk shop pack contains 500 individual seals
• Manufacturer Part Number: B1022

This GSC Power-Division valve stem seal kit is specifically engineered for the Ford Mustang Gen 3 Coyote (5.0L) engine. These units feature an innovative integrated spring seat design, which provides a stable, fixed platform for the valve springs while ensuring a precise, reliable seal around the valve stem.

Replacing worn valve stem seals is critical to preventing oil consumption and blue smoke during startup or deceleration. By combining the seal and the spring seat into a single component, GSC simplifies the installation process and eliminates the risk of the seat shifting during high-RPM operation, making these an essential upgrade for both stock refreshes and high-performance valvetrain builds.

• Fits Ford Mustang Gen 3 Coyote (5.0L) engines
• Integrated valve spring seat and seal design for maximum stability
• Prevents oil from entering the combustion chamber through the valve guides
• Complete set of 32 seals for a full engine service
• Manufacturer Part Number: 1102

Fits Ford Mustang models equipped with the 5.0L Coyote engine.

GSC Power-Division (P-D) valve stem seals with integrated spring seats offer a precise, high-performance solution for Ford 5.0L Coyote cylinder heads. These seals are engineered to maintain a tight oil seal on the valve stem while the integrated spring seat ensures the valve spring remains perfectly centered and stable during high-RPM operation.

• Designed specifically for the Ford 5.0L Coyote DOHC engine
• Integrated spring seat design simplifies installation and improves spring alignment
• High-temperature resistant materials for maximum durability and oil control
• Complete set of 32 seals included for a full engine overhaul
• Manufacturer Part Number: 1101

Fits BMW B58, N54, S55, and S58 engines and the 2020-2024 Toyota GR Supra.

GSC Power-Division Viton intake valve stem seals are a critical upgrade for high-performance BMW and Toyota engines. Manufactured from high-grade Viton fluoroelastomer, these seals offer superior heat and chemical resistance compared to standard OEM rubber. They are designed to withstand the extreme thermal cycles of turbocharged engines, preventing the hardening and cracking that lead to oil consumption and smoke during startup and deceleration.

• Material: High-temperature Viton fluoroelastomer
• Direct replacement for factory intake valve stem seals
• Resistant to degradation from high-performance oils and fuel additives
• Ensures precise oil control on the valve stem
• Includes: Set of 12 intake seals
• Manufacturer Part Number: 1090

Fits select 2007-2024 BMW and Toyota models equipped with N54, S55, S58, or B58 engines, including the GR Supra.

These GSC Power-Division exhaust valve stem seals are manufactured from high-grade Viton fluoroelastomer to provide superior heat resistance compared to standard rubber seals. In high-performance and turbocharged applications, exhaust valve stems reach extreme temperatures that can cause lesser materials to harden and crack. Replacing worn seals with these Viton components ensures a tight seal against the valve stem, preventing oil from leaking into the combustion chamber and reducing oil consumption and blue exhaust smoke.

• Material: High-temperature Viton fluoroelastomer
• Engine Compatibility: N54, S55, S58, B58
• Quantity: Set of 12 exhaust seals
• Application: Exhaust valve side only
• Manufacturer Part Number: 1089

Fits 1993-2007 Dodge Viper models.

Prevent oil consumption and maintain proper valvetrain performance with this set of 20 GSC Power-Division Viton valve stem seals. These seals are engineered to replace worn OE units, providing a precise fit for the high-performance V10 engines found in Gen 1, Gen 2, and Gen 3 Vipers. By utilizing Viton material, these seals offer significantly higher heat resistance and durability compared to standard rubber components, ensuring they remain pliable and effective under extreme operating temperatures.

• Material: High-performance Viton for superior heat resistance
• Quantity: Full set of 20 seals
• Application: Replaces factory valve stem seals for intake and exhaust
• Manufacturer Part Number: 1060

Whether you are performing a routine top-end refresh or a complete engine build, these GSC Power-Division seals provide the oil control necessary to prevent smoke at startup and maintain combustion efficiency.

Maintain precise oil control and protect your combustion chamber with this complete set of GSC Power-Division valve stem seals. Engineered specifically for the Nissan TB48DE engine platform, these 7mm seals are a critical component for any cylinder head refresh or high-performance build.

• Fits Nissan TB48DE (4.8L I6) engines with 7mm valve stems
• Constructed from high-grade Viton for superior heat resistance and chemical durability compared to standard rubber
• Provides a consistent seal to prevent oil from leaking into the intake and exhaust ports
• Resists hardening and cracking under extreme thermal cycles
• Complete set of 24 seals (Full head coverage)
• Manufacturer Part Number: 1054

Maintain precise oil control and prevent blue smoke under high-vacuum and high-boost conditions with this GSC Power-Division Valve Stem Seal set. Engineered specifically for the Nissan RB26DETT engine, these seals provide a reliable barrier between the cylinder head oil supply and the combustion chamber, replacing worn or leaking factory seals during a cylinder head refresh or camshaft installation.

• Direct replacement for Nissan RB26DETT (24-valve) factory valve stem seals.
• Constructed from high-temperature resistant materials to withstand the thermal loads of turbocharged applications.
• Ensures proper lubrication of the valve stem while preventing excess oil from entering the intake and exhaust ports.
• Complete set of 24 seals to cover both intake and exhaust valves.
• Manufacturer Part Number: 1053

Fits 1989-1998 Nissan 240SX models equipped with the SR20DET engine.

Restore your cylinder head's oil control and prevent blue smoke at startup with this GSC Power-Division P-D valve stem seal set. These seals are designed to withstand the high temperatures and pressures of turbocharged SR20DET applications, ensuring a tight seal against the valve stem to prevent oil from leaking into the combustion chamber or exhaust housing. Whether you are performing a routine head refresh or a complete engine rebuild, these components provide the reliability needed for high-performance use.

• Engine Application: Nissan SR20DET
• Compatible with 1989-1998 Nissan 240SX (Base, LE, SE, XE)
• High-temperature resistant construction for forced induction longevity
• Includes full set of intake and exhaust seals
• Manufacturer Part Number: 1052

Fits select 1990-2015 Nissan and Infiniti models including 350Z, Altima, Maxima, Pathfinder, GT-R, G35, and FX35.

Ensure your engine's top-end maintains a perfect seal with this GSC Power-Division P-D valve stem seal set. Manufactured from high-grade Viton, these seals provide significantly better heat and chemical resistance compared to standard rubber OE components. This is critical for performance engines that see elevated combustion temperatures and high-rpm usage, where oil control is paramount to preventing carbon buildup and oil consumption.

These seals are precision-engineered for a 5.5mm valve stem and serve as a direct replacement or upgrade for worn factory seals during a head rebuild or cam installation.

• Manufacturer Part Number: 1050
• Material: High-temperature Viton
• Valve Stem Diameter: 5.5mm
• Application: Intake and Exhaust valve stems
• Direct replacement for factory seals

Fits select 1986-2000 Acura Integra, Honda Civic, CRX, del Sol, and Prelude models.

This GSC Power-Division Viton Valve Stem Seal Kit (MPN 1041) is engineered to provide a superior seal for high-performance and high-temperature cylinder head environments. Manufactured from premium Viton material, these 6.6mm seals offer significantly better heat resistance and longevity compared to standard OEM-style rubber seals. By maintaining a tight seal on the valve stem, this kit prevents oil from leaching into the combustion chamber, effectively eliminating blue smoke at startup and reducing carbon buildup on the valves.

• Manufacturer Part Number: 1041
• Material: High-Temperature Resistant Viton
• Bore Size: 6.6mm
• Compatibility: Honda D16, B18-21, and H23 series engines

Fits select 1990-2015 Acura and Honda vehicles (including Integra, Civic, Accord, RSX, and Prelude) equipped with B, K, and H-series engines. See the fitment table for specific model and trim compatibility.

This GSC Power Division valve stem seal kit is a high-performance upgrade designed for engines demanding superior heat resistance and oil control. Manufactured from high-grade Viton, these seals are engineered to withstand the extreme temperatures and friction common in high-RPM B, K, and H-series builds. Unlike standard rubber seals that can become brittle and leak over time, Viton maintains its flexibility and sealing integrity under harsh conditions.

These 5.5mm seals are a direct fit for the factory valve guides, providing a precise seal on the valve stem to prevent oil from entering the combustion chamber. This kit is essential for refresh builds or when installing aftermarket valves and springs where reliability is paramount.

• Manufacturer Part Number: 1040
• Material: High-temperature Viton
• Valve Stem Diameter: 5.5mm
• Engine Compatibility: Honda/Acura B, K, and H Series
• Quantity: Full set of 16 seals

Maintain precise oil control and protect your engine with the GSC Power-Division Viton 6mm Exhaust Valve Stem Seal Set (MPN 1039). These seals are specifically engineered for Honda B-series, K-series, and H-series engines utilizing a 6mm valve stem. Constructed from high-grade Viton, these seals offer significantly higher heat resistance and durability compared to standard rubber components, making them essential for high-RPM and forced induction applications where exhaust temperatures are extreme.

• Material: High-temperature Viton for superior thermal stability
• Valve Stem Diameter: 6mm
• Position: Exhaust Side
• Compatibility: Fits Honda B-Series, K-Series, and H-Series engines
• Manufacturer Part Number: 1039

By replacing worn or hardened factory seals with GSC Viton seals, you reduce oil consumption and prevent blue smoke during deceleration and startup. These seals are designed to seat securely on the guide, ensuring a reliable seal under the most demanding performance conditions.

Designed for high-performance applications, the GSC Power-Division Viton 5.5mm Valve Stem Seal Set provides superior heat resistance and oil control for the G16E-GTS 3-cylinder engine. These seals are a critical upgrade or replacement when rebuilding the cylinder head for increased boost or track use on the Toyota GR Corolla and GR Yaris.

• High-grade Viton material offers exceptional durability and resistance to extreme combustion temperatures
• Precisely engineered for 5.5mm valve stems to ensure consistent oil metering
• Direct fitment for the 12-valve G16E-GTS cylinder head
• Complete set of 12 seals (includes both intake and exhaust)
• Manufacturer Part Number: 1032

Fits 1988-1995 Toyota Celica and MR2 Turbo models equipped with the 3SGTE engine.

GSC Power-Division (P-D) Viton valve stem seals are an essential upgrade for high-performance 3SGTE cylinder head builds. Unlike standard rubber seals that can become brittle and fail under the extreme thermal stress of a turbocharged engine, these seals are manufactured from high-grade Viton. This material offers superior resistance to heat and chemical degradation, ensuring a long-lasting seal against the valve stem.

Replacing worn valve stem seals with GSC Viton components solves common oil consumption issues, such as blue smoke during cold starts or after idling. These 6mm seals are precision-engineered to maintain the necessary oil film on the valve stem while preventing excess oil from leaking into the intake and exhaust ports.

• Manufacturer Part Number: 1031
• Material: High-temperature Viton
• Valve Stem Size: 6mm
• Engine Compatibility: Toyota 3SGTE
• Full set included for intake and exhaust valves

Fits 1992-2005 Lexus GS300, IS300, SC300, and Toyota Supra (2JZ-GE / 2JZ-GTE).

Maintain precise oil control in your cylinder head with this GSC Power-Division valve stem seal set. Engineered specifically for the Toyota 2JZ engine platform, these seals are manufactured from high-grade Viton. This material offers significantly better heat resistance and durability than standard OEM rubber, making them essential for high-performance builds, turbocharged applications, or standard refreshes where longevity is a priority.

This complete set provides a reliable seal against the 6mm valve stems, preventing oil consumption and blue smoke caused by worn or hardened factory seals. Whether you are performing a top-end rebuild or installing new camshafts, these seals ensure your valvetrain remains clean and efficient.

• Manufacturer Part Number: 1030
• Material: High-temperature Viton
• Stem Diameter: 6mm
• Compatibility: All 2JZ-GE and 2JZ-GTE engines