Secure your valvetrain with the Supertech 6mm Single Groove Valve Lock Conversion. In high-performance and high-RPM applications, a single-groove lock configuration is preferred for its superior clamping force and ability to prevent valve stem fretting compared to traditional multi-groove designs. These locks provide the precise mechanical connection needed between the valve stem and retainer to handle increased spring pressures and aggressive cam profiles.

This set contains 24 individual locks, providing complete coverage for 12 valves at two locks per valve. Engineered from high-strength steel alloy, these components are essential for builders upgrading to performance valves and retainers requiring a 6mm single-groove interface.

• Stem Diameter: 6mm
• Groove Configuration: Single Groove
• Quantity: Set of 24 (Covers 12 valves)
• Material: Precision-machined high-strength alloy
• Installation: Requires 2 locks per valve

Manley 7-degree valve locks provide the precision and strength required for high-performance valvetrain setups. These machined bead locks are designed to securely locate the valve spring retainer on a 5/16" (.3125) valve stem, ensuring stable valve operation even under heavy spring loads and high engine speeds.

Unlike stamped alternatives, these locks are CNC-machined from high-quality steel to exacting tolerances for a consistent fit and reliable clamping force. They are an essential component for engine builders looking for increased durability and valvetrain stability in racing or high-performance applications.

• Angle: 7 Degree
• Valve Stem Size: 5/16" (.3125)
• Lock Style: Machined Bead
• Material: Precision-machined steel
• Quantity: Set of 16

Secure your valvetrain with the GSC Power-Division (P-D) Valve Keeper Set, specifically designed for high-performance Nissan RB26 and Toyota 2JZ engines. These valve locks are critical components that keep the valve spring retainer securely fastened to the valve stem, preventing catastrophic engine damage during high-RPM operation or high-boost conditions.

Precision-machined to exacting tolerances, these keepers ensure a consistent and reliable fit. They are a direct replacement for worn factory hardware and are essential for any build utilizing upgraded valve springs and retainers where valvetrain stability is paramount. This complete set provides all 48 keepers required for 24-valve cylinder head assemblies.

• Direct fit for Nissan RB26 and Toyota 2JZ engines
• Complete set of 48 keepers (supports 24 valves)
• Precision-machined for maximum engagement and retention
• Engineered for high-RPM and performance valvetrain stability
• Maintains critical lock between valve stem and retainer

Secure your valvetrain with Ferrea Radial Groove Steel Valve Locks, specifically engineered for high-performance Subaru builds. These 6mm locks utilize a radial groove design, which is preferred by engine builders for its ability to distribute clamping force more evenly across the valve stem compared to traditional square-cut locks. This reduces stress concentrations, minimizing the risk of stem failure during high-RPM operation and heavy valve spring loads.

Precision-machined from high-tensile steel, these locks provide a reliable, stable interface between the valve and the retainer. Whether you are performing a standard refresh or a full performance build, these components ensure consistent valvetrain geometry and timing accuracy.

• Manufacturer Part Number: K10061
• Valve Stem Diameter: 6mm
• Lock Style: Radial Groove
• Material: Precision-Machined Steel
• Quantity: Complete Set of 16

Secure your valvetrain with this set of 24 Supertech Performance triple groove valve locks, engineered specifically for BMW M50 engines. These precision-machined keepers are designed to provide a robust interface between the valve stem and the spring retainer, maintaining critical valve positioning and spring tension even under high-RPM stress and aggressive camshaft lift.

Manufactured to exacting tolerances, these locks are an essential upgrade or replacement during cylinder head assembly. The triple-groove design ensures maximum surface contact for superior retention, preventing valve drop and protecting your engine's internal components during performance driving or racing applications.

• Fits: BMW M50 engines
• Design: Triple Groove
• Quantity: Full set of 24 locks
• Part Number: KPR-VW6-T-24
• Ideal for performance cylinder head builds and high-RPM reliability

Ensure your valvetrain remains secure under high-performance conditions with the Supertech 6mm Stem Triple Groove Valve Lock Set. These precision-engineered keepers are designed specifically for engines utilizing 6mm stems and triple groove valve profiles, providing a reliable, high-tolerance connection between the valve and the retainer.

Commonly used in select Audi, BMW, and Opel applications, these locks are manufactured to exacting standards to prevent valvetrain failure during high-RPM operation. Since each valve requires two locks for a complete assembly, this 16-piece set is sufficient to service eight individual valves.

• Stem Diameter: 6mm
• Lock Type: Triple Groove
• Quantity: Set of 16 (Services 8 valves; requires 2 per valve)
• Manufacturer Part Number: KPR-VW6-T-16
• Application: Compatible with select Audi, BMW, and Opel valvetrain systems

Fits 1997+ Mazda Miata models equipped with 1.6L or 1.8L engines.

Ensure your valvetrain remains secure under high-RPM stress with this Supertech 6mm valve lock set. Precision-engineered for a perfect seat on 6mm valve stems, these keepers provide a critical connection between the valve and the retainer. Whether you are performing a cylinder head refresh or building a high-performance forced-induction engine, these locks offer the reliability needed for consistent valve control.

• Designed specifically for 6mm diameter valve stems
• Includes 16 locks (secures 8 valves; requires 2 locks per valve)
• High-strength construction for performance applications
• Manufacturer Part Number: KPR-MIATA97+-16

Ensure your valvetrain remains secure under high-RPM conditions with this set of 32 Supertech Toyota-style valve locks. These locks are precision-machined to provide a perfect interface between the valve stem and the retainer, preventing component failure and maintaining proper spring tension. Designed for performance engines, they are essential for maintaining valvetrain geometry and stability when using upgraded springs and retainers.

• Stem Diameter: 6mm
• Lock Angle: 6 Degrees
• Style: Toyota-style
• Quantity: Set of 32 (completes 16 valves at 2 locks per valve)
• Manufacturer Part Number: KPR-6T-ST-32

Ensure secure valve retention in your high-performance cylinder head with this Supertech Toyota-style valve lock set. These keepers are precision-engineered to provide a stable, tight-tolerance interface between the valve stem and the retainer, which is critical for maintaining valve train integrity under high-RPM operation and heavy spring loads.

• Manufacturer Part Number: KPR-6T-ST-24
• Stem Diameter: 6mm
• Lock Angle: 6 Degree
• Style: Toyota-style single groove
• Quantity: Set of 24 (provides locks for 12 valves)

Each valve requires two locks for proper installation. These components are designed to replace worn OE keepers or to be used in conjunction with Supertech performance retainers and valves that utilize the 6-degree locking system.

Ensure valvetrain stability during high-RPM operation with the Supertech KPR-6S-7-32 single groove valve lock conversion kit. This set is engineered to provide a precise, high-strength interface between the valve stem and the retainer, preventing component failure and maintaining consistent valve spring tension.

Specifically designed for 6mm valve stems, these 7-degree locks are a critical upgrade for performance builds where the factory multi-groove setup may be a point of failure. By converting to a single groove design, you gain a more secure clamping force necessary for high-lift cams and increased spring pressures.

• Valve Stem Diameter: 6mm
• Taper Angle: 7-Degree
• Groove Style: Single Groove Conversion
• Quantity: Set of 32 (Requires 2 locks per valve; provides coverage for 16 valves)
• MPN: KPR-6S-7-32

Ensure superior valvetrain stability with the Supertech 6mm Single Groove Valve Lock Conversion kit. Precision-machined for high-performance and high-RPM applications, these locks provide a more secure interface between the valve stem and retainer than standard multi-groove configurations. This conversion is essential when utilizing performance valves and retainers designed for the 6mm single-groove standard.

• Manufacturer Part Number: KPR-6S-7-20
• Valve Stem Diameter: 6mm
• Groove Type: Single Groove
• Quantity: Set of 20 (requires 2 locks per valve)
• Engineered for maximum clamping force and reduced valvetrain wear

Ensure precise valve retention and valvetrain stability with the Supertech 6mm Single Groove Valve Lock Conversion Set. Engineered for high-performance engine builds, these precision-machined locks are designed to handle the stresses of high-RPM operation and increased valve spring pressures. This set allows for a reliable conversion to a single-groove configuration on 6mm valve stems.

The KPR-6S-7-16 set includes 16 individual locks. As each valve assembly requires two locks for proper seating, this kit provides enough components to complete 8 valves. These locks are a critical component for maintaining correct valve height and preventing retainer failure under load.

• Manufacturer Part Number: KPR-6S-7-16
• Valve Stem Diameter: 6mm
• Groove Style: Single
• Quantity: Set of 16 (Requires 2 per valve)
• Application: Designed for 6mm valve stem conversion

Optimize your valvetrain assembly with the Supertech 6mm Single Valve Lock Conversion. These locks are engineered to provide a secure, high-strength interface between the valve stem and the retainer. Converting to a single-groove (single tang) design is a preferred upgrade for high-RPM racing engines, as it reduces stress risers on the valve stem compared to multi-groove alternatives, ensuring better component longevity under extreme conditions.

• Manufacturer Part Number: KPR-6S-7-12
• Stem Diameter: 6mm
• Groove Profile: Single Groove
• Quantity: Set of 12 (Requires 2 locks per valve; sufficient for 6 valves)
• Construction: Heat-treated alloy steel for superior wear resistance and fatigue life

Precision-machined for exact fitment, these Supertech components ensure stable valve control under extreme thermal and mechanical loads. These are designed for use with compatible 7-degree retainers and valves with a 6mm stem diameter.

Ensure valvetrain stability and precise assembly with this set of 24 Supertech 6mm 6-degree valve locks. These locks are CNC machined from high-strength steel to exacting tolerances, providing a more consistent and secure fit than standard stamped alternatives. Designed specifically for high-performance applications, these locks maintain a firm grip on the valve stem to prevent retainer movement and ensure reliability during high-RPM operation.

• Precision CNC machined for consistent geometry and lock-up
• Designed for 6mm valve stems with a 6-degree taper
• Set includes 24 locks, sufficient for 12 valves
• Heat-treated steel construction for maximum durability
• Manufacturer Part Number: KPR-6N-6-ST-24

Ensure valvetrain stability in high-performance and high-RPM engines with this set of Supertech CNC machined valve locks. Designed specifically for 6mm valve stems and a 6-degree taper, these locks provide a precise, secure interface between the valve stem and retainer, minimizing the risk of movement or failure under extreme mechanical stress.

Unlike standard stamped keepers, these Supertech components are CNC machined from high-strength alloy steel to exacting tolerances. This precision manufacturing process ensures consistent clamping force and a perfect fit, which is critical for maintaining correct valve spring seat pressure and preventing dropped valves in demanding racing applications.

• Manufacturer Part Number: KPR-6N-6-ST-16
• Valve Stem Diameter: 6mm
• Lock Angle: 6 Degree
• Manufacturing Process: CNC Machined
• Quantity: Set of 16

Ensure your valvetrain remains secure under high-load conditions with this set of Supertech 7-degree valve keepers. Specifically engineered for Honda LS engines utilizing 6.6mm valve stems, these precision-machined locks provide the critical interface between your valve spring retainers and valve stems to prevent component failure.

This comprehensive set includes 32 individual keepers, which is the exact amount required to complete a 16-valve cylinder head assembly (two keepers per valve). For the best results and proper geometry, these are recommended for use with Supertech retainers.

• Manufacturer Part Number: KPR-6.6-LS-32
• Stem Diameter: 6.6mm
• Lock Taper: 7 Degree
• Application: Honda LS
• Quantity: Set of 32 (Requires 2 per valve)

Ensure valvetrain stability and precise retainer seating with this set of Supertech 5.5mm 7-degree valve locks. Designed for high-performance engine builds, these precision-machined locks (keepers) provide a secure interface between the valve stem and the retainer, preventing component separation or failure under high-RPM stress.

These locks are an essential component when upgrading to performance valves or retainers that utilize a 7-degree taper. This set includes 32 pieces, which is sufficient for a full 16-valve cylinder head assembly (utilizing two locks per valve).

• Stem Diameter: 5.5mm
• Taper Angle: 7 Degrees
• Quantity: Set of 32 (Serves 16 valves)
• Manufacturer Part Number: KPR-5.5-7A-ST-32

This set of Supertech valve locks (keepers) is precision-engineered for high-performance valvetrain stability. Designed specifically for valves with a 5.5mm stem diameter, these locks feature a 7-degree taper to ensure a precise, secure interface between the valve stem and the spring retainer.

• Stem Diameter: 5.5mm
• Lock Angle: 7 Degrees
• Quantity: Set of 16 (Requires 2 per valve)
• Manufacturer Part Number: KPR-5.5-7A-ST-16

Constructed to demanding tolerances, these locks are essential for maintaining correct valve spring seat pressure and preventing retainer movement in high-RPM or high-lift racing applications. This kit includes 16 individual locks, sufficient for 8 valves.

This Supertech valve lock set is engineered for high-performance valvetrain configurations requiring a 5.5mm stem diameter and a 7-degree taper. These specific locks feature a .030" taller height, providing engine builders a precise method to increase valve spring installed height without the need for machining spring seats or altering retainers.

Precision-machined for exact tolerances, these locks ensure a secure and stable interface between the valve stem and the retainer, critical for maintaining valvetrain integrity at high RPMs. Each valve requires two locks for proper installation; this 32-piece set provides enough components for a complete 16-valve cylinder head assembly.

• Stem Diameter: 5.5mm
• Taper Angle: 7 Degrees
• Height Offset: +.030" (Taller)
• Quantity: Set of 32 (Covers 16 Valves)
• Manufacturer Part Number: KPR-5.5-7A-LG-32

Supertech precision-engineered valve locks are designed to provide a secure and reliable interface between the valve stem and retainer, ensuring valvetrain stability under high-RPM and high-load conditions. These standard-height locks are manufactured from high-quality materials to meet rigorous tolerances for performance engine builds.

• Stem Diameter: 5.5mm
• Lock Angle: 7 Degrees
• Profile: Standard height
• Quantity: Set of 32 (Required: 2 locks per valve)
• Manufacturer Part Number: KPR-5.5-7A-32

This set of 32 pieces provides sufficient hardware to complete a 16-valve cylinder head. Always verify that your retainers are compatible with 7-degree locks and that your valve stems measure exactly 5.5mm for proper fitment and seat pressure consistency.

Ensure valvetrain stability in high-performance applications with the Supertech 5mm Single Groove Valve Lock Conversion kit. These precision-machined locks are designed to convert valves to a single-groove configuration, a common requirement for high-RPM builds where reducing stress concentrations on the valve stem is critical for longevity and reliability.

By moving to a single-groove design, these locks provide a more secure interface between the valve stem and retainer compared to standard triple-groove setups. This set is engineered to withstand the rigors of aggressive camshaft profiles and high spring pressures found in racing engines.

• Stem Diameter: 5.0mm
• Groove Type: Single Groove
• Installation: Requires 2 locks per valve
• Quantity: Set of 32 (sufficient for 16 valves)
• Manufacturer Part Number: KPR-5.0-7S-32

The Supertech KPR-5.0-7S-24 valve lock set is engineered for high-performance engine builders looking to convert to a more robust single-groove setup. Designed specifically for 5mm valve stems, these locks provide a precise fit and increased stability under the stresses of high-RPM operation and aggressive camshaft profiles.

Transitioning from multi-groove to single-groove locks is a standard upgrade for racing and track applications, as it minimizes the potential for valve stem wear and significantly reduces the risk of keeper failure. Each lock is manufactured to exacting tolerances to ensure proper seating and consistent valve spring installed height.

• Manufacturer Part Number: KPR-5.0-7S-24
• Stem Diameter: 5mm
• Groove Type: Single Groove
• Quantity: Set of 24 (Completes 12 valves)
• Requirement: 2 locks required per valve

Fits select 1992-2011 Acura Integra, RSX, TSX, and Honda Accord, Civic, CR-V, Element, Prelude, and S2000 models.

Manley Sport Compact valve locks are engineered for precision and reliability in high-performance valvetrains. These 13010-8 valve locks feature a 5.5mm bore and an OEM-style radius groove to ensure a secure interface between the valve stem and the retainer. Designed as a direct replacement for factory locks or for use with Manley Sport Compact series retainers, these components provide the clamping force necessary to prevent retainer pull-through or valve drop during high-RPM operation.

• Precision machined from high-strength steel alloy
• 5.5mm stem diameter compatibility
• OEM radius groove profile for reliable seating
• Set of 8 pieces
• Manufacturer Part Number: 13010-8

Fits select Subaru EJ205, EJ207, EJ257, EJ257B, and SOHC EJ engines.

Maintain valvetrain integrity with the GSC Power-Division Valve Keeper Set. These precision-machined valve locks are critical for securing the valve spring retainer to the valve stem, ensuring stable operation even under the stresses of high-performance use. A worn or improperly seated keeper can lead to catastrophic engine failure; these GSC components provide the exact tolerances required for a secure lock.

This set of 32 keepers is specifically designed for Subaru EJ-series 16-valve engines, providing two keepers per valve for a complete engine overhaul or valvetrain upgrade. Whether you are refreshing a daily driver or building a high-boost EJ257, these keepers offer the reliability needed for professional engine assembly.

• Precision machined for consistent fitment and valve stem engagement
• Compatible with EJ205, EJ207, EJ257, EJ257B, and SOHC EJ platforms
• Ideal for use with GSC retainers or as high-quality replacements for OE hardware
• Quantity: Set of 32 (Full engine set for 16 valves)
• Manufacturer Part Number: 1006

Fits 1990-2006 Mitsubishi Lancer Evolution, Eclipse, Galant VR-4, Eagle Talon, and Plymouth Laser with 4G63T engines.

GSC Power-Division valve keepers are precision-engineered components designed to securely lock the valve spring retainer to the valve stem. For high-performance builds involving high-lift camshafts or increased RPM limits, replacing worn OE keepers with a fresh set of GSC precision locks ensures valvetrain stability and helps prevent valve float or lock failure. This complete set includes 32 keepers, providing a full replacement for a 16-valve 4G63T cylinder head.

• Precision machined to exacting tolerances for superior fitment
• Direct replacement for factory keepers in high-performance applications
• Essential for maintain valvetrain integrity at high RPMs
• Manufacturer Part Number: 1003
• Quantity: Set of 32

Fits Volkswagen 12v VR6 engines (2.8L).

Ferrea Radial Steel Valve Locks are precision-engineered to provide superior clamping force and valvetrain stability. Designed for the specific requirements of the 12v VR6 cylinder head, these 7-degree locks are machined from high-grade steel to ensure a reliable interface between the valve stem and the retainer. They are essential for maintaining correct valve timing and preventing failure in high-performance or high-RPM applications.

• Part Number: K10099
• Material: High-strength steel
• Taper: 7-Degree
• Lock Style: Radial groove
• Quantity: Set of 12

Fits 2008-2015 Mitsubishi Lancer Evolution X (2.0L 4B11T).

Secure your valvetrain with this set of Ferrea 5.5mm valve locks, engineered specifically for the 4B11T engine. These locks (also known as keepers) provide a precise, high-strength interface between the valve stem and the retainer. Precision-machined to strict tolerances, they are an essential upgrade for high-RPM applications and performance builds where maintaining valvetrain integrity is critical.

• Manufacturer Part Number: K10091
• Stem Diameter: 5.5mm
• Quantity: Set of 16 (Complete set for 16-valve cylinder heads)
• Engine Compatibility: Mitsubishi 2.0L 4B11T
• Application: High-performance and racing valvetrain systems

Ensure precise valve retention and valvetrain stability in your Nissan 2.4L KA24DE engine with Ferrea K10062 Steel Valve Locks. These 7mm radial groove locks are engineered for high-performance applications, providing the necessary strength to handle increased RPM and aggressive cam profiles. They replace standard factory keepers with high-strength steel components designed for exact tolerances.

Fits Nissan 2.4L KA24DE engines. Note: These valve locks are specifically designed for use with Ferrea E11021 retainers to ensure proper fitment and security.

• Manufacturer Part Number: K10062
• Engine Fitment: Nissan KA24DE (2.4L)
• Stem Diameter: 7mm
• Lock Style: Radial Groove
• Material: High-strength steel
• Quantity: Set of 16
• Required Hardware: Must be used with Ferrea E11021 retainers

Designed for select Toyota engines, these Ferrea K10037 6-degree valve locks provide the precision and reliability required for high-performance valvetrains. Whether you are performing a complete cylinder head rebuild or upgrading for high-RPM stability, these locks ensure your valve spring retainers stay securely seated under extreme stress.

These valve locks feature a radial groove design, which is specifically engineered to distribute pressure more evenly across the valve stem compared to traditional square-groove designs. Precision-machined to exact tolerances, the 6-degree taper provides a secure interface between the valve and the retainer, preventing component separation and potential valvetrain failure.

• Manufacturer Part Number: K10037
• Quantity: Set of 24 locks
• Groove Type: Radial Groove
• Taper Angle: 6-Degree
• Compatibility: Engineered for select Toyota engine applications
• Application: Ideal for street performance and racing environments

Ensure maximum valvetrain stability and security with the Ferrea K10034 5.5mm Radial Groove Steel Valve Locks. These locks are precision-machined from high-tensile steel to withstand the extreme stresses of high-performance and racing environments. Designed specifically for valves featuring a 5.5mm stem diameter and a radial groove configuration, they provide a consistent, reliable seat within a 7-degree retainer.

• Manufacturer Part Number: K10034
• Stem Diameter: 5.5mm
• Groove Type: Radial Groove
• Taper Angle: 7-Degree
• Material: High-quality machined steel
• Quantity: Set of 16 (Complete for 4-cylinder 16-valve applications)

Proper valve lock engagement is critical for maintaining valve height and preventing catastrophic engine failure under high RPM and increased spring pressures. This set of 16 locks replaces worn or inferior OE hardware in performance valvetrain builds.