Valve Locks for LS, Coyote, K Series, 2JZ and RB Engines

What Valve Locks Cover

Valve locks, also called keepers, secure the retainer to the valve stem and hold the spring package in place. This collection covers hardened steel locks for performance cylinder heads, from stock style radial locks to dedicated single groove and bead lock designs.

Valve locks and keepers

The right lock must match the valve stem diameter, keeper groove, retainer profile and lock angle. A small mismatch can prevent full engagement and compromise valve control at engine speed.

Lock Angles and Groove Styles

Seven degree locks provide a wide contact area commonly chosen for high rpm applications. Ten degree and stock style radial systems must use the matching retainer, while single groove and bead lock parts are engineered around their specific valve stem grooves.

7 degree and 10 degree systems

Do not mix lock angles or groove formats. Choose the pieces as a matched valvetrain package so the retainer seats fully and the installed height remains correct.

Engine Platforms in This Collection

Applications include LS, Coyote, Hemi, Honda and Acura K series, Subaru EJ, Toyota 1JZ and 2JZ, Nissan SR and RB, Volkswagen VR6 and 16V, BMW and Mazda Miata engines. Each listing identifies the relevant stem size and groove configuration.

Import and domestic performance heads

These compact components are not universal just because the basic diameter is similar. Use exact engine and cylinder head details when filtering the catalog.

Building a Complete Valvetrain

Locks work with the spring, retainer, valve and seal as one assembly. A camshaft upgrade or higher boost build often requires a valvetrain designed for the intended lift, rpm range and valve control demand.

Matched springs retainers and seals

Pair the correct locks with matching retainers and springs, then confirm installed height, spring pressure and retainer to seal clearance during assembly.

Installation and Inspection

Install clean locks into the matching retainer and verify that both halves seat evenly in the keeper groove. After compressing the spring, release the tool slowly and inspect every retainer before rotating the engine.

Careful assembly matters

Replace damaged or questionable locks rather than reusing them. A fresh matched set is inexpensive insurance when the engine will see sustained rpm or boost.

Top Valve Lock Brands

• Supertech. Single groove conversions, 7 degree locks and platform specific valve keeper sets
• Ferrea. Steel radial groove locks for European, Subaru and high performance engine combinations
• Brian Crower. Billet keepers for Honda, Toyota, Nissan and Subaru performance builds
• Manley Performance. Sport compact valve locks sized for popular Honda and Acura applications
• GSC Power Division. Subaru EJ valve keeper sets built for performance cylinder heads

How to Choose the Correct Valve Locks

• Confirm valve stem diameter and keeper groove count
• Match the lock angle to the retainer
• Choose radial, single groove or bead lock style to match the valves
• Verify the set quantity required for the full cylinder head
• Confirm the lock material is suited to the engine rpm goal
• Check valve spring and retainer compatibility
• Measure installed height after final assembly
• Inspect locks for even seating in each retainer
• Replace locks if there is wear, galling or distortion
• Use the exact engine family and head application when filtering

Common Questions

What are valve locks?

Valve locks are two piece keepers that secure the valve retainer to the groove at the end of the valve stem.

Are valve locks and valve keepers the same part?

Yes. Both names describe the small paired pieces that lock the retainer to the valve stem.

Can I use 7 degree locks with 10 degree retainers?

No. The lock angle and retainer must match exactly for safe and complete engagement.

What is a single groove valve lock?

A single groove lock is designed for a valve stem with one keeper groove and must be matched to the correct retainer.

Do valve locks fit every valve stem with the same diameter?

No. Groove profile, lock angle and retainer design also determine compatibility.

Should I replace valve locks during a cylinder head rebuild?

Replacing worn or uncertain locks during a rebuild is a smart way to protect the new valvetrain assembly.

How many valve locks does an engine need?

Each valve uses two lock halves, so a typical 16 valve engine needs 32 individual lock pieces.

Do performance engines need hardened valve locks?

Performance engines benefit from locks engineered for the matching spring load, rpm and valve control requirement.

Can I reuse valve locks after removing the retainers?

Only reuse locks that pass close inspection, match the parts being installed and have no signs of wear or damage.

What should I verify before ordering valve locks?

Verify engine family, valve stem diameter, keeper groove style, lock angle, retainer and the number of valves.

Why Buy Valve Locks from Black Ops Auto Works

Black Ops Auto Works stocks 41 Valve Locks SKUs across street performance, boosted imports, domestic V8s and serious cylinder head builds with real fitment data, competitive pricing and support from staff who build these vehicles themselves. Products are filterable by year, make, model, trim, engine and drivetrain to confirm the correct application before ordering.

For focused shopping, browse our valves and components, valve seals, head components and Comp Cams parts.