Designed for high-performance and high-heat applications, these Supertech Inconel exhaust valves provide the thermal stability required for turbocharged, supercharged, or high-compression Honda B16A and B18C engines. Inconel is a nickel-base superalloy specifically chosen for exhaust valves to prevent deformation and failure under extreme combustion temperatures where standard stainless steel may reach its limits.

Each valve is precision-machined to ensure consistent seating and optimal flow. This set of eight valves is a direct-fit upgrade for builders looking to increase reliability in high-horsepower B-Series cylinder heads.

• Part Number: HEVI-1000-8
• Material: Inconel (Nickel-base superalloy)
• Application: Honda B16A and B18C engines
• Quantity: Complete set of 8 exhaust valves
• Engineered for extreme temperature resistance in forced induction setups

Fits GM Ecotec engines (2.0L / 2.2L / 2.4L).

This set of eight Supertech intake valves is engineered for high-performance GM Ecotec cylinder head builds. Each valve features a black nitrided finish, a hardening process that provides a smoother surface for reduced friction in the valve guide and superior resistance to heat and wear compared to traditional chrome plating. The +0.5mm oversize diameter is designed to maximize airflow potential, making these an essential upgrade for forced induction or high-RPM naturally aspirated applications requiring head porting and seat machining.

Supertech utilizes specialized forging and precise CNC machining to ensure these valves maintain dimensional stability under extreme thermal stress. These components are built to handle the increased cylinder pressures and temperatures of modified 2.0L, 2.2L, and 2.4L Ecotec platforms while ensuring a consistent, reliable seal.

• Manufacturer Part Number: GIVN-0012S-8
• Valve Type: Intake
• Head Diameter: +0.5mm Oversize
• Material/Finish: Black Nitrided
• Quantity: Set of 8 Valves

Fits GM Ecotec 2.0L and 2.2L engines.

This set of eight Supertech Inconel exhaust valves is engineered for high-performance GM Ecotec applications where extreme heat is a constant factor. Inconel is a specialized nickel-based superalloy chosen for its exceptional ability to maintain structural integrity and resist oxidation at elevated exhaust gas temperatures (EGTs). These valves are a critical upgrade for turbocharged, supercharged, or high-compression racing engines that push beyond the thermal limits of standard stainless steel components.

• Material: Inconel superalloy for superior heat resistance
• Engine Compatibility: GM Ecotec 2.0L and 2.2L
• Quantity: Set of 8 exhaust valves
• Application: Ideal for forced induction and high-EGT racing environments
• Manufacturer Part Number: GEVI-0012S-8

Fits Toyota 4AGE engines.

Engineered for high-performance cylinder head builds, this set of eight Supertech manganese bronze valve guides (MPN GDE-T4AG-SM-8) provides superior heat dissipation and lubricity compared to standard OE components. The manganese bronze alloy is specifically chosen for its ability to withstand high thermal loads while maintaining tight tolerances, ensuring your 6mm valve stems remain stable and properly aligned during high-RPM operation.

• Precision machined from high-quality manganese bronze for reduced friction and improved heat transfer
• Designed for 6mm valve stems in both intake and exhaust positions
• Optimized for use with Supertech VS-T6SM viton valve seals
• Helps prevent premature valve guide wear in forced induction or high-performance naturally aspirated applications
• Complete set of 8 guides included
• Manufacturer Part Number: GDE-T4AG-SM-8

Improve cylinder head reliability and thermal management in your Toyota Supra 2JZ with this set of Supertech Manganese Bronze Intake Valve Guides. Designed specifically for the intake side of the 2JZ platform, these guides are compatible with 6mm valve stems and serve as a precision-machined upgrade for factory components during a performance rebuild.

Manganese bronze is a preferred material for high-performance valve train components due to its superior thermal conductivity and natural lubricity. These guides effectively transfer heat away from the valve stem and into the cylinder head while minimizing friction, extending the life of your valves and maintaining tighter tolerances under high-stress conditions.

• Material: Precision-machined Manganese Bronze
• Application: Intake ports only
• Valve Stem Diameter: 6mm
• Quantity: Set of 12 guides
• Manufacturer Part Number: GDE-T2JZ-I-12

Supertech manganese bronze valve guides are engineered for high-performance Toyota 2JZ cylinder heads. Manganese bronze is a superior material choice over standard OE guides, offering significantly better thermal conductivity and natural lubricity to reduce friction and heat buildup during high-RPM or high-boost operation.

These exhaust guides feature a precision-machined 11.03mm outer diameter to ensure a stable, secure press-fit into the cylinder head. Designed to accommodate a 6mm valve stem, they are a critical component for any 2JZ valvetrain rebuild where durability and heat dissipation are priorities.

• Manufacturer Part Number: GDE-T2JZ-E-12
• Material: High-strength Manganese Bronze
• Exhaust Stem Diameter: 6.00mm
• Outer Diameter: 11.03mm
• Quantity: Set of 12 guides

Ensure precise valve alignment and improved heat dissipation in your Toyota 20V (4A-GE) cylinder head with this set of Supertech manganese bronze intake valve guides. Specifically engineered for high-performance and racing applications, these guides are machined from a high-quality manganese bronze alloy that offers superior thermal conductivity compared to standard cast iron components.

These guides are designed for 5mm valve stems and are fully compatible with both stainless steel and titanium valves. The material's low-friction properties help reduce wear on the valve stems, making them a critical upgrade for high-RPM builds where reliability and tight tolerances are paramount.

• Precision machined from manganese bronze for optimal lubrication and wear resistance
• High thermal conductivity for efficient heat transfer from the valve to the cylinder head
• Designed for Toyota 20-Valve (4A-GE) engine configurations
• Compatible with 5mm diameter valve stems
• Quantity: Set of 12 intake guides
• Manufacturer Part Number: GDE-T20V-I-12

Fits Toyota 20V (4AGE) engines.

Supertech manganese bronze valve guides are precision-machined to provide superior thermal conductivity and lubricity compared to standard OEM components. Designed specifically for the high-heat environment of the exhaust side, these guides effectively pull heat away from the valve stem to ensure consistent performance and extended service life in high-RPM or forced induction applications.

The manganese bronze alloy offers a lower coefficient of friction, reducing wear on the valve stems while maintaining tight tolerances. These are a direct replacement for worn factory guides and are essential for any high-performance cylinder head rebuild.

• Manufacturer Part Number: GDE-T20V-E-8
• Material: High-Quality Manganese Bronze
• Stem Diameter: 5mm
• Application: Exhaust side
• Engine Compatibility: Toyota 20V (4AGE Silvertop/Blacktop)
• Quantity: Set of 8

Fits Subaru EJ20 and EJ25 engines.

These Supertech Performance intake valve guides are precision-machined from high-quality manganese bronze, a material chosen specifically for its superior thermal conductivity and wear resistance. In high-performance and turbocharged EJ-series builds, managing heat at the valve stem is critical; these guides facilitate faster heat transfer from the valve to the cylinder head compared to standard OEM components.

Designed for 6mm valve stems, these guides maintain tight tolerances to ensure proper valve seating and stability at high RPMs. Manganese bronze also provides excellent lubricity, reducing the risk of valve sticking or galling under extreme thermal loads.

• Precision-machined from manganese bronze for enhanced durability and heat dissipation
• Specifically sized for 6mm intake valve stems
• Compatible with Subaru EJ20 and EJ25 engine platforms
• Set of 8 intake guides included
• Manufacturer Part Number: GDE-SUEJ6-I-8

Maintain precise valve stem alignment and improve heat dissipation in your Subaru EJ20 or EJ25 engine with this set of Supertech manganese bronze exhaust valve guides. These guides are engineered to replace worn factory units, providing superior lubricity and wear resistance compared to standard cast iron guides, making them ideal for high-performance and turbocharged applications.

• Precision machined from high-quality manganese bronze for reduced friction and improved thermal conductivity.
• Designed specifically for exhaust side applications in Subaru EJ-series cylinder heads.
• Specifications: 6mm Stem Diameter and 11.08mm Outer Diameter.
• Direct replacement for OE guides to ensure stable valve motion at high RPM.
• Quantity: Set of 8 exhaust guides.
• Manufacturer Part Number: GDE-SUEJ6-E-8.

Designed for the Nissan SR20DET engine, this set of eight Supertech exhaust valve guides is precision-machined to restore valvetrain geometry and improve thermal conductivity. These guides are essential for high-performance cylinder head builds where maintaining exact valve stem alignment is critical for valve seal longevity and consistent combustion sealing.

• Engine Fitment: Nissan SR20DET
• Stem Diameter: 7mm
• Location: Exhaust
• Quantity: Set of 8
• MPN: GDE-NSR7-ET-8

Each guide is manufactured to exacting tolerances to ensure a proper press-fit into the factory cylinder head, providing a durable, low-friction bearing surface capable of withstanding the extreme heat and stress of turbocharged applications.

This set of 12 Supertech exhaust valve guides is engineered for Nissan SR20DET and RB26 engines. Designed to meet the rigorous demands of high-performance and turbocharged builds, these guides provide superior thermal conductivity and wear resistance compared to standard factory components.

Replacing worn factory guides with Supertech precision-machined units ensures consistent valve stem alignment, improving valve seal longevity and overall cylinder head efficiency. These guides are specifically sized for 7mm valve stems on the exhaust side of the cylinder head.

• Engine Fitment: Nissan SR20DET, RB26
• Stem Diameter: 7mm
• Application: Exhaust Side
• Quantity: Set of 12
• Manufacturer Part Number: GDE-NSR7-ET-12

Upgrade your cylinder head with this set of 8 Supertech intake valve guides, precision-engineered for the Nissan SR20DET engine. These guides are machined from a high-quality manganese bronze alloy, a material specifically selected for its exceptional thermal conductivity and superior wear resistance in high-performance environments.

Designed to accommodate 6mm valve stems, these manganese bronze guides offer significantly lower friction than standard OEM cast iron units, making them an essential upgrade for high-RPM or forced induction builds. They provide a stable, durable interface when used with aftermarket stainless steel or titanium valves, ensuring consistent valve alignment and improved heat transfer away from the valve stem to prevent premature wear.

• Material: High-strength manganese bronze alloy
• Fitment: Nissan SR20DET engines
• Stem Diameter: 6mm
• Application: Intake side
• Quantity: Set of 8 guides
• Manufacturer Part Number: GDE-NSR6-I-8

Designed for high-performance Nissan SR20DET and RB26 engines, these Supertech intake valve guides replace worn factory components to restore precise valve stem-to-guide clearance. Machined from a high-quality manganese bronze alloy, these guides offer significantly better heat transfer and lubricity than standard cast iron, making them essential for turbocharged applications where thermal management is critical.

These guides are precision-engineered for a 6mm valve stem, ensuring tight tolerances for improved valve stability and consistent seating. By reducing friction and dissipating heat more efficiently, they help prevent valve seizing and extend the service life of both the valves and the cylinder head.

• Manufacturer Part Number: GDE-NSR6-I-12
• Material: Manganese Bronze Alloy
• Type: Intake Valve Guide
• Stem Diameter: 6mm
• Quantity: Set of 12
• Application: Nissan SR20DET and RB26DETT engines

Precision-engineered for high-performance applications, this set of eight Supertech Manganese Bronze exhaust valve guides is designed specifically for the Nissan SR20DE engine. These guides are a critical upgrade for builds requiring tighter tolerances and superior heat dissipation compared to standard cast iron components.

Manganese bronze is the material of choice for professional engine builders due to its high thermal conductivity and excellent lubricity. This combination reduces friction on the valve stem and efficiently transfers heat away from the exhaust valves, significantly extending component life in high-RPM or forced induction environments. Each guide is machined to exacting specifications to ensure a proper interference fit in the cylinder head and consistent valve-to-guide clearances.

• Material: High-quality Manganese Bronze for improved wear resistance
• Application: Nissan SR20DE engines
• Valve Stem Diameter: 6mm
• Position: Exhaust
• Quantity: Set of 8 guides
• Manufacturer Part Number: GDE-NSR6-E-8

Improve cylinder head durability and heat dissipation in your Nissan SR20DE with this set of 12 Supertech Manganese Bronze exhaust valve guides. Engineered for 6mm valve stems, these high-performance guides (MPN: GDE-NSR6-E-12) are designed to withstand the extreme thermal loads found in turbocharged and high-RPM naturally aspirated builds.

Manganese bronze is preferred by engine builders over standard cast iron due to its superior thermal conductivity and lower coefficient of friction. These attributes help pull heat away from the exhaust valve stems more efficiently while maintaining tighter tolerances over the service life of the engine. Whether you are performing a standard rebuild or a full race prep, these guides provide the stability required for precise valve seating.

• Material: Precision-machined Manganese Bronze alloy
• Application: Exhaust side only
• Compatibility: Designed for Nissan SR20DE engines with 6mm valve stems
• Quantity: Full set of 12 guides
• Part Number: GDE-NSR6-E-12

Fits Mini Cooper R56 models.

Precision-engineered for high-performance cylinder head builds, these Supertech valve guides are manufactured from high-quality manganese bronze. Designed to offer superior heat dissipation and reduced friction compared to standard cast iron guides, these components are an essential upgrade for engines running stainless steel or titanium valves.

Manganese bronze provides excellent wear resistance and maintains tight tolerances under extreme thermal stress, ensuring consistent valve stem alignment and sealing. Whether you are performing a standard top-end refresh or building a high-output engine, these guides provide the durability and precision needed for R56 cylinder heads.

• Material: Manganese Bronze
• Application: Intake and Exhaust (Standard Size)
• Quantity: Set of 8
• Manufacturer Part Number: GDE-MIN-R56-STD-8

Restore valvetrain stability and ensure precise valve stem alignment with this set of Supertech intake and exhaust valve guides. Engineered specifically for the Mini Cooper R56 equipped with the N14 engine, these guides are designed to provide a high-tolerance fit that facilitates efficient heat transfer and reduces stem wear under high-stress operating conditions.

Measuring 44.9mm in length, these guides are a critical component for any cylinder head rebuild, whether restoring factory performance or prepping for high-RPM use. This complete set includes eight guides, suitable for servicing both the intake and exhaust positions on your cylinder head.

• Fits: Mini Cooper R56 (N14 engine)
• Component: Intake and Exhaust Valve Guides
• Quantity: Set of 8
• Length: 44.9mm
• Manufacturer Part Number: GDE-MIN-R56-OS-8

This set of eight Supertech valve guides is engineered for high-performance cylinder head builds where durability and heat dissipation are critical. Precision-machined from a high-quality manganese bronze alloy, these guides offer superior thermal conductivity compared to standard cast iron components, helping to pull heat away from the valve stems more efficiently.

Specifically designed for the Mini Cooper R53 platform, these guides feature a low-friction surface that resists seizing and wear, even in the high-heat environment of a supercharged engine. They are compatible with both intake and exhaust positions, providing a consistent 6mm fitment for the valvetrain.

• Material: Manganese Bronze alloy for superior heat transfer and wear resistance
• Compatibility: Fits both intake and exhaust valve positions
• Stem Diameter: 6.00mm
• Quantity: Set of 8 guides
• Manufacturer Part Number: GDE-MIN-R53-8

This set of eight Supertech intake valve guides is engineered specifically for the Mitsubishi 4G63 engine series. Precision-machined from a high-quality manganese bronze alloy, these guides provide significantly better heat dissipation and a lower coefficient of friction than standard OEM cast iron components, ensuring valve stability under high thermal loads.

• Engine Application: Mitsubishi 4G63 Series
• Material: Manganese Bronze Alloy
• Valve Stem Diameter: 6.6mm
• Component Type: Intake Valve Guide
• Quantity: Set of 8
• Manufacturer Part Number: GDE-MI66-STI-8

Designed to maintain precise valve stem alignment and minimize guide wear, these components are an essential upgrade for high-performance cylinder head builds and high-boost applications where superior thermal management and lubricity are required.

When rebuilding a high-performance Mitsubishi 4G63 cylinder head, maintaining tight tolerances at the valve stem is critical for engine longevity and valve seal performance. This set of eight Supertech exhaust valve guides is designed specifically for the Mitsubishi 4G63 series engine to accommodate a 6.6mm valve stem.

Replacing worn factory guides with these precision-machined Supertech components ensures consistent valve seating and improves heat dissipation from the valve stem to the cylinder head casting. These guides are engineered to withstand the high thermal loads found on the exhaust side of turbocharged 4G63 applications, helping to prevent valve tipping and premature seal failure.

• Manufacturer Part Number: GDE-MI66-STE-8
• Engine Compatibility: Mitsubishi 4G63 Series
• Valve Stem Diameter: 6.6mm
• Position: Exhaust
• Quantity: Set of 8 guides

Fits Mitsubishi 4G63 engines.

Supertech manganese bronze valve guides are precision-machined to provide superior thermal conductivity and a low coefficient of friction. Designed for high-performance applications, these intake guides offer improved heat dissipation compared to factory cast iron components, which is critical for maintaining valve seat integrity and preventing stem seizure in high-boost or high-RPM environments. These guides are specifically engineered for use with 6.6mm valve stems, ensuring precise tolerances and long-term durability in built 4G63 cylinder heads.

• Engine Compatibility: Mitsubishi 4G63
• Material: Manganese Bronze
• Placement: Intake
• Stem Diameter: 6.6mm
• Quantity: Set of 8
• Manufacturer Part Number: GDE-MI66-I-8

Fits Mitsubishi 4G63 series engines.

Supertech Exhaust Valve Guides are engineered to maintain precise valve stem alignment and optimal heat transfer in high-performance cylinder heads. These precision-machined guides replace worn factory components to ensure stable valve operation, protecting your valvetrain from premature wear and helping to maintain consistent compression across all cylinders.

• Manufacturer Part Number: GDE-MI66-E-8
• Application: Exhaust valves
• Stem Diameter: 6.6mm
• Engine Compatibility: Mitsubishi 4G63
• Quantity: Complete set of 8 guides

Upgrade your cylinder head with this set of 8 Supertech Manganese Bronze intake valve guides, engineered specifically for the Mazda Miata (1.8L). These guides are precision-machined from a high-quality manganese bronze alloy, providing superior heat transfer and natural lubricity compared to standard cast iron components. This material choice is ideal for reducing friction and extending the life of your valvetrain in high-performance, forced induction, or high-RPM racing environments.

• Manufacturer Part Number: GDE-MA18-I-8
• Material: High-quality Manganese Bronze alloy
• Application: Mazda Miata (1.8L)
• Quantity: Set of 8 intake valve guides
• Optimized for superior thermal conductivity and wear resistance
• Precision machined for consistent valve stem clearances

Restore cylinder head precision with this set of eight Supertech exhaust valve guides, specifically engineered for Mazda (1.8L) engines. These guides are critical for maintaining exact valve stem alignment and facilitating efficient heat transfer from the valve to the cylinder head. Whether you are performing a standard refresh or a high-performance build, these guides provide the durability and tight tolerances necessary to prevent oil consumption and premature valve seat wear.

• Engineered for Mazda 1.8L exhaust valve applications
• Precision-machined for consistent stem-to-guide clearances
• Replaces worn factory guides to stabilize valve movement at high RPM
• Manufacturer Part Number: GDE-MA18-E-8
• Includes a complete set of 8 guides

Fits 2000-2009 Honda S2000.

Supertech manganese bronze valve guides are engineered for high-performance applications where thermal management and lubricity are critical. These intake guides serve as a superior replacement for factory components, offering significantly better heat dissipation and reduced friction between the valve stem and the guide. This is especially vital for the high-revving F20C and F22C engines, ensuring valve stability and longevity under demanding track or street conditions.

• Precision-machined from high-quality manganese bronze alloy
• Enhanced heat transfer properties compared to standard OEM cast iron guides
• Low-friction material improves valve stem life and performance
• Designed for 5.5mm valve stems
• Set of 8 intake guides
• Manufacturer Part Number: GDE-HS255-I-8

Fits 2000-2009 Honda S2000 (F20C / F22C1).

Supertech precision-machined manganese bronze valve guides are engineered for high-performance and racing applications where thermal efficiency and durability are paramount. These exhaust guides provide superior heat transfer and natural lubricity compared to factory cast iron components, significantly reducing the risk of valve seizing under high-load conditions. Specifically designed to work with 5.5mm valve stems, these guides are an essential upgrade during a cylinder head rebuild to ensure precise valve-to-seat alignment and extended valvetrain life.

• Material: High-quality Manganese Bronze for enhanced heat dissipation
• Stem Diameter: 5.5mm
• Position: Exhaust
• Quantity: Set of 8 guides
• Manufacturer Part Number: GDE-HS255-E-8

Fits select Honda K20 engines.

Maintain precise valve geometry and optimal heat transfer in your cylinder head with this set of Supertech exhaust valve guides. Engineered to exact tolerances for the K20 engine, these guides are essential for high-performance builds or standard cylinder head refreshes. Proper valve stem-to-guide clearance is critical for preventing oil consumption and ensuring consistent valve seating under high-stress conditions.

• Manufacturer Part Number: GDE-HM66-E-8
• Quantity: Set of 8
• Stem Diameter: 6.6mm
• Position: Exhaust
• Fitment: Honda K20 Series Engines

Fits Honda K-Series engines.

Optimize your cylinder head's performance and longevity with this set of Supertech manganese bronze intake valve guides. These guides are precision-engineered for the Honda K-Series platform, specifically designed to accommodate a 5.5mm valve stem. Manganese bronze is a superior material choice for high-performance builds, offering significantly better thermal conductivity and natural lubricity compared to standard cast iron guides.

By improving heat transfer away from the valve stem and maintaining tighter tolerances under extreme thermal loads, these guides help prevent valve seizing and minimize guide wear in high-RPM or forced induction applications. Each guide is machined to exacting specifications to ensure consistent oil clearance and stable valve seating.

• Material: High-quality Manganese Bronze
• Application: Intake Side
• Stem Diameter: 5.5mm
• Quantity: Set of 8
• Manufacturer Part Number: GDE-HK55-I-8

This Supertech precision cam follower shim is engineered for accurate valve lash adjustment in high-performance valvetrains. Manufactured to exacting tolerances, these shims are critical for maintaining proper engine timing and component longevity by ensuring correct clearance between the camshaft and the follower.

Built from high-grade materials to resist wear and deformation under high-stress racing conditions, this shim allows for the precise tuning required when installing aftermarket cams or performing cylinder head refreshes.

• Diameter: 8mm
• Thickness: 1.80mm
• Application: Valve lash adjustment for compatible 8mm cam followers
• Part Number: CF-SHIM-1.80