What is the purpose of valve locks (keepers)?

Valve locks, or keepers, are small components that fit into grooves on the valve stem. They work with the valve spring retainer to keep the valve spring assembly securely in place on the valve.

Why would I need oversized valve locks like these (+.050)?

Oversized valve locks are used when the valve stems have been machined to a larger diameter. This is common in performance engine builds or repairs to ensure a tight, secure fit and proper sealing.

Are these locks compatible with all valve spring retainers?

These valve locks feature a 10-degree taper, which is a common angle for many performance retainers. It's important to ensure your valve spring retainers are also designed for a 10-degree lock angle for proper fitment.

Specifications

Brand: Manley Performance
Part #: 13198T-16
UPC: 807298069418

Manley Valve Lock/Keeper, LOC-10 DEG +.050 .3415

Name: Manley Valve Lock/Keeper, LOC-10 DEG +.050 .3415
Brand: Manley Performance
SKU: manley-performance-manley-valve-lock-keeper-loc-10-deg-050-3415-t14-880848
Price: 234.91 USD
Availability: BackOrder

$234.91

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Manley valve locks for engine builds. These 10-degree keepers ensure your valves stay securely in place.

Key Features

Fits engine builds requiring 10-degree valve locks.
Oversize +.050 inch for machined valve stems.
Well-built to handle engine stresses.
Securely holds valve springs and retainers.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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About this part

Product Details

If you're rebuilding the top end of your engine, getting the valve train right is crucial. These valve locks, also known as keepers, are what hold your valve springs and retainers together. They're a small but mighty part of ensuring your engine runs smoothly and reliably.

Manley Performance makes these locks with a 10-degree taper, which is a common angle for many performance applications. This set is also +.050 inches oversized, meaning they're designed to fit valve stems that have been machined to a larger diameter, often done during a performance rebuild to ensure a snug fit. They are well-built to handle the stresses of engine operation, keeping your valves seated properly under pressure.

When you're putting an engine back together, especially one that's been modified or is getting a full overhaul, using parts you can trust is key. These Manley valve locks are a solid option for ensuring your valve train components stay where they belong.