What is the purpose of valve lock keepers?

Valve lock keepers, also known as valve collets, are small components that fit into grooves on the valve stem and the underside of the valve spring retainer. Their main job is to lock the retainer onto the valve stem, preventing the valve spring and retainer assembly from coming loose during engine operation.

Why would I choose titanium valve keepers over steel?

Titanium valve keepers are chosen for performance applications because they are lighter than steel. This reduced weight in the valvetrain can help improve its stability at higher engine speeds, potentially allowing for better valve control and reducing the risk of valve float.

What does the '+.050' sizing mean for these keepers?

The '+.050' indicates that these keepers are slightly larger than standard, specifically designed to fit valve stems that are 0.050 inches oversized. This is common when using valves that have been re-ground or are larger than stock, ensuring a snug fit with the retainer.

Specifications

Brand: Manley Performance
Part #: 13038T-8
UPC: 807298063744

Manley Valve Lock/Keeper, LOC-TI S7 7mm +.050 B/L

Name: Manley Valve Lock/Keeper, LOC-TI S7 7mm +.050 B/L
Brand: Manley Performance
SKU: manley-performance-manley-valve-lock-keeper-loc-ti-s7-7mm-050-b-l-t14-880338
Price: 136.24 USD
Availability: BackOrder

$136.24

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Manley Performance valve lock keepers. These keepers ensure your valve train stays secure during high-RPM operation.

Key Features

Manley Performance valve lock keepers for engine builds.
Made from a titanium alloy for strength and reduced weight.
Designed for high-RPM operation and aggressive camshaft profiles.
Set is sized at 7mm with a +.050 inch offset.
Helps ensure secure valve spring and retainer seating.

⚠️ 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 the top end of your engine, especially for performance builds where valve float can be a serious issue, you need valve keepers you can trust. These Manley LOC-TI S7 valve lock keepers are designed to securely hold your valve springs and retainers in place, even under the stress of high RPMs and aggressive camshaft profiles. They are made from a titanium alloy, which offers a good balance of strength and light weight, helping to reduce overall valvetrain mass. This particular set is sized at 7mm with a +.050 inch offset, meaning they are designed to fit specific valve stem diameters and retainer configurations. Proper installation is key to ensuring they function as intended and prevent any valve-to-piston contact.

Manley has a solid reputation for making well-built performance engine components, and these valve keepers are no exception. The titanium construction is a notable upgrade over standard steel keepers, offering improved durability and reduced weight. This can contribute to a more stable valvetrain at higher engine speeds. The +.050 inch sizing is important; make sure this matches the specifications for your valve stems and the retainer grooves you are using. If you're unsure, it's always best to double-check your measurements or consult your engine build guide.