What does '+.050 inch undersize' mean for these valve keepers?

This means the keepers are designed to fit valve stems that have been machined down by 0.050 inches from their original size. This is common in performance engine builds or when replacing worn valve guides and stems.

What is the purpose of valve lock keepers?

Valve lock keepers, also known as collets, are small components that fit into a groove on the valve stem. They work with the valve spring retainer to hold the valve spring assembly together and keep the valve properly seated.

Are these keepers sold individually or as a set?

This product is sold as a set of 16 keepers, which is typically enough for a complete set of valves on a four-cylinder engine, or half of a V8 engine.

Specifications

Brand: Manley Performance
Part #: 13032-16
UPC: 807298063607

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

Name: Manley Valve Lock/Keeper, LOC-CAPT.3415 +.050
Brand: Manley Performance
SKU: manley-performance-manley-valve-lock-keeper-loc-capt-3415-050-t14-880210
Price: 175.17 USD
Availability: BackOrder

$175.17

On Backorder

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

Manley Performance valve lock keepers. These are +.050 inch undersize keepers for your valve train.

Key Features

This product includes 16 valve lock keepers.
These keepers are +.050 inch undersize.
Manley Performance is a well-known brand for engine components.

⚠️ 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

When you're rebuilding an engine, especially if you're working on the cylinder heads, you'll need reliable valve lock keepers to hold everything together. This set from Manley Performance gives you 16 keepers, designed to work with valve stems that are +.050 inch undersize. They are a crucial part of the valve spring assembly, ensuring the valve collets properly seat and keep the valve spring under tension.

Manley Performance is known for making well-built internal engine components. These keepers are made to precise tolerances to ensure they seat correctly and hold the valve collets securely. Using the right size keepers is important for proper valve train geometry and function, and these +.050 inch undersize keepers are specifically made for applications where the valve stems have been machined down to that size.