Fits Toyota FR-S and Subaru BRZ.

Engineered to withstand the extreme thermal loads of high-performance racing, this set of eight Supertech Inconel exhaust valves (SEVI-1050-2-8) is a critical upgrade for the FA20 engine. Unlike standard stainless steel, Inconel nickel-base superalloys maintain their structural integrity and resist oxidation at the significantly higher exhaust gas temperatures (EGTs) typically found in turbocharged, supercharged, or high-compression naturally aspirated builds.

• Material: High-strength Inconel alloy for superior heat resistance
• Application: Exhaust side only
• Engineered for high-RPM and forced induction environments
• Quantity: Set of 8 valves
• Manufacturer Part Number: SEVI-1050-2-8

Fits Subaru EJ25 engines.

Designed for the extreme thermal loads of high-performance and forced-induction builds, these Supertech exhaust valves are manufactured from Inconel 751. This nickel-base superalloy is specifically chosen for its ability to maintain structural integrity and resist oxidation at temperatures that would compromise standard stainless steel valves. Whether you are building a high-boost EJ25 or a dedicated track engine, these valves provide the heat resistance necessary for long-term reliability.

Each valve is precision-machined to ensure a perfect seat-to-valve seal and optimized flow within the cylinder head. These are direct replacements for worn or factory-spec valves when upgrading to more robust internal components.

• Material: Inconel 751 (Nickel-Base Superalloy)
• Application: Subaru EJ25 Engines
• Component: Exhaust Valve
• Quantity: Set of 8
• Manufacturer Part Number: SEVI-1016-8

Fits Subaru EJ20 and EJ25 engines. These Supertech Inconel exhaust valves are engineered to withstand the extreme thermal loads found in high-boost and competition Subaru boxer engines. Manufactured from a specialized nickel-based superalloy, Inconel provides superior resistance to heat-induced fatigue and oxidation compared to standard stainless steel components.

This set of eight +1mm oversize valves increases the effective valve head diameter to improve exhaust flow and cylinder scavenging, making them an essential upgrade for built cylinder heads targeting higher horsepower. Because these are oversize components, professional machining of the valve seats is required for installation. Each valve is precision-ground to ensure tight tolerances and consistent seating under high-stress conditions.

• Material: High-strength Inconel superalloy
• Valve Type: Exhaust
• Head Diameter: +1.00mm Oversize
• Quantity: Set of 8 valves
• Manufacturer Part Number: SEVI-1014-8

Fits Subaru EJ20 and EJ25 engines.

These Supertech Performance exhaust valves are specifically engineered for high-output turbocharged Subaru builds where exhaust gas temperatures (EGTs) reach critical levels. Manufactured from Inconel, a high-strength nickel-based superalloy, these valves maintain structural integrity under extreme thermal stress that would compromise standard stainless steel components.

The defining feature of the SEVI-1010-HS-8 series is the sodium-filled hollow stem. As the valve operates, the liquid sodium transfers heat away from the valve face and through the stem to the valve guide and cylinder head cooling jackets. This improved thermal management reduces the risk of pre-ignition and allows for more aggressive tuning in high-boost EJ20 and EJ25 applications.

• Material: Inconel Superalloy
• Design: Sodium-filled hollow stem for superior cooling
• Quantity: Set of 8 exhaust valves
• Manufacturer Part Number: SEVI-1010-HS-8

Fits Subaru EJ20 and EJ25 engines. These Supertech Inconel exhaust valves are engineered specifically for high-performance applications where extreme cylinder temperatures are the norm, such as high-boost turbocharged or anti-lag setups.

Unlike standard stainless steel valves, Inconel is a high-nickel base alloy that maintains its structural integrity and resists oxidation at much higher thermal thresholds. This makes it an essential upgrade for Subaru builders looking for long-term reliability under heavy thermal load. Each valve is precision-manufactured to exact tolerances for consistent seating and heat dissipation.

• Material: High-Nickel Inconel Alloy
• Application: Subaru EJ20 and EJ25 Engines
• Valve Type: Exhaust
• Quantity: Set of 8
• Manufacturer Part Number: SEVI-1010-8

Fits Subaru EJ20 and EJ25 engines, including those found in the Subaru WRX. This Supertech spring seat locator set provides a stable base for your valve springs, protecting the aluminum cylinder head from damage while ensuring consistent spring alignment during high-RPM operation.

Engineered for precision and durability, these locators are 1.0mm thick and are specifically designed to work in conjunction with the Supertech SPR-TS1015 spring kit. Replacing worn or incompatible seats with these hardened components helps maintain the integrity of your valvetrain geometry.

• Manufacturer Part Number: SEAT-TS-SUB-3-16
• Thickness: 1mm
• Quantity: Set of 16
• Application: Subaru EJ20 / EJ25 Engines
• Compatibility: Designed for Supertech SPR-TS1015 Spring Kits
• Material: High-quality hardened steel construction

Fits Honda RSX and S2000.

These Supertech spring seat locators are precision-engineered to provide a stable foundation for high-performance valvetrain assemblies. Designed specifically for use with Supertech H1020 series dual valve springs, these locators prevent spring walk and maintain proper vertical alignment during the high-RPM demands of performance engines. By securing the base of the spring, these components protect the cylinder head from oscillation-induced wear and ensure consistent spring rates throughout the valve lift cycle.

• Compatible with Supertech H1020 series dual springs
• Prevents spring seat walk and lateral movement
• Precision machined for exacting tolerances and long-term durability
• Critical for high-lift and high-RPM valvetrain stability
• Quantity: Set of 16
• Manufacturer Part Number: SEAT-H1020DS-16

Ensure valvetrain stability and protect your cylinder head with this set of 16 Supertech Performance dual valve spring seat locators. Precision-engineered to provide a secure, flat mounting surface, these locators prevent spring walk during high-RPM operation, maintaining proper spring alignment and ensuring consistent valve control.

These components are essential when upgrading to a dual spring setup. They correctly position both the inner and outer springs while shielding the aluminum cylinder head from the abrasive movement of the valve springs under load. Manufactured to exacting tolerances, they are a critical component for high-performance valvetrain builds.

• Designed specifically for dual valve spring configurations
• Prevents spring movement and protects the cylinder head surface
• Precision machined for exact fitment and durability
• Complete set of 16 locators
• Manufacturer Part Number: SEAT-H1002D-16

Upgrade your valvetrain with this set of 16 Supertech titanium valve spring retainers. Engineered for high-performance and racing applications, these retainers utilize aerospace-grade titanium alloy to significantly reduce reciprocating mass compared to factory steel components. This weight reduction is critical for maintaining valve control at high RPMs and preventing the valve float that can lead to catastrophic engine damage.

Each retainer is CNC-machined to precise tolerances to ensure a perfect fit with 6.6mm stems and standard 7-degree valve locks. These components are essential for builders seeking increased valvetrain stability and reliability in high-lift or high-revving engine configurations.

• Material: High-strength Titanium Alloy
• Valve Stem Diameter: 6.6mm
• Lock Angle: 7 Degree
• Quantity: Set of 16
• Manufacturer Part Number: RET-TS66-T1-16

Lighten your valvetrain and increase RPM potential with this set of Supertech titanium retainers. Specifically engineered to seat with Supertech H1000 series valve springs, these retainers significantly reduce reciprocating mass compared to factory steel components, providing the valvetrain stability required to prevent valve float during high-performance operation.

Each retainer is CNC-machined from aerospace-grade 6AL4V titanium alloy. This material choice ensures high strength-to-weight ratios and tight tolerances, making them an essential upgrade for engines utilizing aggressive cam profiles and high-lift setups. Precise fitment ensures proper spring tension and secure valve stem retention under extreme thermal and mechanical stress.

• Material: High-grade 6AL4V Titanium
• Quantity: Full set of 16 retainers
• Compatibility: Designed for Supertech H1000 Series valve springs
• Manufacturer Part Number: RET-K20A2-T2-16

Engineered for high-performance valvetrain stability, the Supertech Titanium Retainer is designed specifically for use with Supertech H1000 Series valve springs. These retainers are manufactured from high-strength, aerospace-grade titanium to provide an optimal strength-to-weight ratio, which is critical for high-RPM engine builds where reducing reciprocal mass is essential to prevent valve float.

Precision-machined to exacting tolerances, these titanium retainers replace heavier factory steel components, allowing the valvetrain to respond more accurately to aggressive camshaft profiles. This ensures consistent seat pressure and reliable performance under extreme racing conditions.

• Material: High-strength aerospace-grade titanium
• Application: Specifically designed for Supertech H1000 Series springs
• Function: Reduces valvetrain mass to increase RPM potential and prevent valve float
• Precision machined for exact fitment and durability
• Manufacturer Part Number: RET-K20A2-T2

Fits BMW S52 engines.

Supertech steel valve spring retainers are engineered for high-performance valvetrains that demand superior fatigue resistance and long-term durability. While titanium retainers offer weight advantages, these high-strength steel components provide the longevity required for high-mileage street performance and endurance racing applications where valvetrain stability is critical.

Each retainer is precision CNC-machined to exacting tolerances, ensuring a secure fit with the valve springs and keepers to prevent spring surge and maintain consistent seat pressure throughout the RPM range.

• Manufacturer Part Number: RET-HBK-ST-24
• Material: High-strength chromoly steel
• Engine Application: BMW S52
• Quantity: Set of 24
• Designed for high-RPM valvetrain stability

Fits BMW S42, Honda B16A, and Acura B18C5 engines.

Engineered for high-RPM valvetrain stability, these Supertech spring retainers are precision-manufactured from high-quality steel. While titanium retainers are often used in race-only applications, steel retainers provide exceptional durability and wear resistance for street performance and long-duration endurance builds where longevity is a priority.

• Precision machined for exact fitment with compatible valve springs
• High-strength steel construction for maximum durability
• Designed to handle increased spring pressures and high engine speeds
• Quantity: Complete set of 16 retainers
• Manufacturer Part Number: RET-HBK-ST-16

Fits BMW N54 24V (3.0L) engines.

These Supertech steel valve spring retainers are precision-engineered for the high-performance demands of the BMW N54 platform. While titanium is often favored for weight, high-grade steel retainers offer superior fatigue resistance and long-term durability in high-mileage or street-driven applications. These components provide a stable seat for the valve spring, ensuring consistent valvetrain geometry even under high-RPM conditions.

This set is specifically designed for use with Supertech SPR-FE20N54-BE valve springs to ensure exact fitment and proper spring tensioning.

• Material: High-strength steel for maximum durability
• Quantity: Set of 12
• Engine Fitment: BMW N54 24V (3.0L)
• Required Springs: Designed for use with SPR-FE20N54-BE
• Manufacturer Part Number: RET-BMN54-TI-12

Engineered for precision valve train adjustment, this Supertech factory-style shim replacement is designed specifically for the Nissan RB26 engine. Maintaining proper valve lash is critical for engine longevity and performance, especially when rebuilding a cylinder head or installing high-lift aftermarket camshafts.

This shim is manufactured to exacting tolerances to ensure a perfect fit within the valve bucket. High-grade materials and a precision-ground finish provide the durability necessary to withstand the high-RPM stresses common in performance RB26DETT builds. Use this 3.15mm thick shim to achieve the precise clearance required for optimal valvetrain geometry and quiet operation.

• Fits Nissan RB26DETT engines
• Diameter: 12.15mm
• Thickness: 3.15mm
• Manufacturer Part Number: RB26-SHIM-3.15
• Direct replacement for factory shim-over-bucket configurations
• Precision ground for accurate valve clearance settings

Achieve precise valve lash settings on your Nissan RB26 engine with this Supertech factory-style replacement shim. These shims are critical for correct cylinder head assembly, ensuring that the clearance between the camshaft lobe and the lifter bucket remains within factory or aftermarket camshaft specifications.

Manufactured to exacting tolerances, this shim allows engine builders to compensate for valve tip wear or valve job geometry changes. Using the correct thickness is essential for maintaining valvetrain stability and preventing premature wear at high RPMs.

• Engine Application: Nissan RB26
• Diameter: 12.15mm
• Thickness: 3.10mm
• Material: High-strength steel alloy
• Manufacturer Part Number: RB26-SHIM-3.10

Maintain precise valvetrain lash settings in your Nissan RB26 engine with this Supertech factory-style shim replacement. These precision-ground shims are essential for establishing the exact valve clearances required for optimal camshaft performance and valvetrain longevity, whether you are performing a standard rebuild or a high-performance head build.

Each shim is manufactured to high tolerances to withstand the high-RPM stresses common in RB-series engines. This component is a direct replacement for the factory shim, ensuring compatibility with the stock valvetrain geometry while providing the specific thickness needed for your lash adjustment.

• Engine Fitment: Nissan RB26
• Diameter: 12.15mm
• Thickness: 3.05mm
• Construction: High-strength precision-ground steel
• Manufacturer Part Number: RB26-SHIM-3.05
• Application: Factory shim-over-bucket valvetrain

Engineered for precise valvetrain adjustment, this Supertech factory-style shim replacement is designed specifically for Nissan RB26 engines. Proper valve lash is critical for maintaining performance and preventing valvetrain wear; these shims allow builders to achieve exact clearances in high-performance or stock applications.

• Fits Nissan RB26 engines
• Precision-ground for accurate 3.00mm thickness
• Outer Diameter: 12.15mm
• Direct replacement for original equipment (OE) shims
• High-strength steel construction to withstand high RPM and heavy spring pressures
• Manufacturer Part Number: RB26-SHIM-3.00

Fits Nissan RB26 engines.

Achieving precise valve lash is critical for valvetrain longevity and performance, particularly in high-RPM Nissan RB26 builds. These Supertech factory-style replacement shims allow for exact clearance adjustments during cylinder head assembly or after installing new camshafts. Manufactured from high-strength steel to resist wear and maintain tolerances under heavy valve spring loads, they provide a direct-fit solution for maintaining valvetrain geometry.

• Diameter: 12.15mm
• Thickness: 2.95mm
• Construction: High-strength hardened steel
• Part Number: RB26-SHIM-2.95
• Designed for precise valve lash adjustment

Designed for precise valve lash adjustment on Nissan RB26 engines, this Supertech factory-style shim replacement allows engine builders to maintain exacting valvetrain tolerances. These shims are essential components when installing aftermarket camshafts or performing a cylinder head refresh where factory clearances must be reset for optimal performance and longevity.

• Direct replacement for factory Nissan RB26 cylinder head shims
• Precision machined for consistent thickness and diameter
• Outside Diameter: 12.15mm
• Thickness: 2.80mm
• Critical for proper valvetrain geometry and lash settings
• Manufacturer Part Number: RB26-SHIM-2.80

Maintain precise valve lash and optimal valvetrain performance with this Supertech 12.15mm cam follower shim. Engineered for precision and durability, these shims are essential for fine-tuning the clearance between the camshaft and the valve, ensuring your engine operates at its peak efficiency while minimizing unnecessary wear on valvetrain components.

Each shim is precision-ground to exacting tolerances to ensure consistency across the entire valvetrain. Manufactured from high-strength materials, they are built to withstand the high-stress environment of high-performance cylinder heads, particularly in RB26 engine builds where 12.15mm shims are standard.

• Manufacturer Part Number: RB26-SHIM-2.70
• Shim Diameter: 12.15mm
• Thickness: 2.7mm
• Application: Designed for RB26 engines and compatible 12.15mm lifter/bucket setups
• Construction: Precision-ground hardened steel for maximum wear resistance

This Supertech precision-ground cam follower shim is designed for high-performance valvetrain applications where exact valve lash clearances are critical. Manufactured from high-strength hardened steel and finished to precise tolerances, these shims provide the durability needed for high-RPM operation and heavy-duty use.

• Manufacturer Part Number: RB26-SHIM-2.65
• Diameter: 12.15mm
• Thickness: 2.65mm
• Material: Precision-ground hardened steel
• Function: Adjusts valve lash for overhead cam engines

Designed for the Nissan RB26 engine, this Supertech factory shim replacement provides the precision necessary for accurate valve lash adjustment. Maintaining correct clearances is vital for valvetrain longevity and performance, particularly in high-RPM applications where consistent cam-to-lifter contact is required.

• Fits Nissan RB26 engines
• Diameter: 12.15mm
• Thickness: 2.60mm
• Direct replacement for factory shims
• Hardened construction for wear resistance
• Manufacturer Part Number: RB26-SHIM-2.60

Whether performing a cylinder head rebuild or routine maintenance, these shims allow builders to achieve exact tolerances. They are engineered to withstand the stresses of performance valve springs and aggressive camshaft profiles without deforming.

This Supertech 12.15mm diameter cam follower shim is engineered for precise valve lash adjustment in performance valvetrains. Designed for use in engines with solid lifter conversions or bucket-style followers, such as the Nissan RB26, these shims allow for exact clearances necessary to maintain camshaft profile accuracy and engine reliability.

• Diameter: 12.15mm
• Thickness: 2.55mm
• Manufacturer Part Number: RB26-SHIM-2.55
• Material: Precision-ground, high-strength steel for maximum durability and wear resistance
• Application: Essential for setting valve clearances after camshaft installation or valvetrain service

This Supertech precision-ground cam follower shim is engineered for high-performance valvetrain configurations requiring exact valve lash adjustments. Manufactured from high-strength steel, these shims are designed to withstand the significant mechanical stresses of high-RPM operation and aggressive camshaft profiles.

Each shim is ground to precise tolerances to ensure consistent valvetrain geometry and reliable performance. Proper valve clearance is critical for maximizing power output and preventing premature wear on camshaft lobes and followers.

• Diameter: 12.15mm
• Thickness: 2.5mm
• Material: High-strength steel alloy
• Finish: Precision ground for accurate tolerances
• Manufacturer Part Number: RB26-SHIM-2.50

This Supertech cam follower shim is engineered for precise valvetrain adjustment, ensuring your camshaft profiles operate within exact tolerances. These shims are critical for setting correct valve lash, which is essential for maintaining engine performance, optimizing lift, and preventing premature wear on high-performance valvetrain components.

• Diameter: 12.15mm
• Thickness: 2.20mm
• Material: High-strength hardened steel construction to resist deformation under high RPMs
• Function: Precise valve lash adjustment for overhead cam cylinder heads
• Manufacturer Part Number: RB26-SHIM-2.20

Precision-ground to the stated 2.2mm thickness, this shim provides a reliable solution for engine builders seeking to achieve perfect clearance in performance applications.

Achieve precise valve lash and maintain optimal valvetrain geometry with this Supertech precision-ground cam follower shim. Designed for high-performance engines utilizing shim-over-bucket or shim-under-bucket lifter setups, these shims allow technicians to set the exact clearance between the camshaft lobe and the follower for improved longevity and performance.

Each shim is manufactured from high-strength steel and ground to exacting tolerances to ensure perfectly parallel surfaces and consistent thickness. This is critical for preventing uneven wear on the camshaft and ensuring stable valve timing, especially in high-RPM applications or builds with aggressive cam profiles.

• Diameter: 12.15mm
• Thickness: 2.10mm
• Material: Precision-ground hardened steel
• Manufacturer Part Number: RB26-SHIM-2.10
• Essential for accurate valve lash adjustment during cylinder head assembly

Ensure a superior combustion seal and long-term durability with these Supertech high-performance piston rings. Engineered for 89.5mm bore applications, these rings feature a gas-nitrided surface treatment that significantly increases surface hardness and wear resistance while reducing friction against the cylinder wall. These characteristics are essential for high-RPM and forced induction builds where thermal loads and cylinder pressures are elevated.

• Precision-engineered for 89.5mm bore engines
• Gas-nitrided finish for enhanced surface hardness and reduced friction
• Designed to maintain consistent tension under high thermal loads
• Compatible with high-performance and racing piston sets

Specifications:

• Bore Size: 89.5mm
• Top Ring: 1.0mm x 3.30mm
• Second Ring: 1.2mm x 3.70mm
• Oil Ring: 2.8mm x 3.30mm
• Material: Gas Nitrided Steel
• Manufacturer Part Number: R89.5-GNH8950

Supertech high-performance piston rings are engineered for maximum sealing and long-term durability in demanding engine environments. This 89mm bore ring set features a gas nitrided surface treatment, which significantly increases surface hardness and provides excellent wear resistance while reducing friction against the cylinder wall.

• Bore Diameter: 89mm
• Top Ring: 1.0mm height x 3.30mm radial width
• Second Ring: 1.2mm height x 3.70mm radial width
• Oil Ring: 2.8mm height x 3.30mm radial width
• Surface Treatment: Gas Nitrided for enhanced hardness and friction reduction
• Part Number: R89-GNH8900

Designed to withstand the extreme thermal and mechanical loads of performance builds, these rings ensure consistent compression and precise oil control. The gas nitriding process provides a hard, wear-resistant layer that helps prevent scuffing and extends the service life of both the rings and the cylinder bores.

Ensure a superior cylinder seal and reduced friction with this Supertech Gas Nitrided Piston Ring Set (MPN: R88-GNH8800). Engineered for 88mm bore performance applications, these rings are designed to withstand the extreme combustion pressures and thermal loads of built engines. The gas nitriding process creates a high-hardness surface that significantly improves wear resistance and longevity compared to traditional chrome or phosphate coatings.

• Bore Size: 88mm
• Top Ring Thickness: 1.0mm x 3.30mm
• Second Ring Thickness: 1.2mm x 3.60mm
• Oil Ring Thickness: 2.8mm x 3.30mm
• Material: High-performance steel with Gas Nitrided finish
• Manufacturer Part Number: R88-GNH8800