What does 'file fit' mean for these piston rings?

A file-fit piston ring means you need to adjust the end gap of the rings yourself using a specialized file before installing them. This allows you to precisely match the gap to your cylinder bore size, which is critical for proper sealing and engine performance.

What are the specific dimensions of these rings?

This set features a 1.5mm top ring, a 1.5mm second ring, and a 3.0mm oil control ring. The bore size is 4.125 inches, with the rings themselves being 4.130 inches before filing.

Specifications

Brand: Manley Performance
Part #: 46360ST-8
UPC: 807298041452

Manley Chevy Small Block LS Series 4.125in Bore 4.130in File Fit Ring Set 1.5mm x 1.5mm x 3mm

Name: Manley Chevy Small Block LS Series 4.125in Bore 4.130in File Fit Ring Set 1.5mm x 1.5mm x 3mm
Brand: Manley Performance
SKU: manley-performance-manley-chevy-small-block-ls-series-4-125in-bore-4-130in-file--t14-4378869
Price: 451.39 USD
Availability: BackOrder

$451.39

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Manley LS Series steel top piston ring set for 4.125in bore engines. File fit design for precise installation.

Key Features

Fits Chevy Small Block LS series engines with a 4.125 inch bore.
Features a 4.130 inch file-fit design for precise end gap adjustment.
Top ring is constructed from steel for improved durability.
Ring dimensions are 1.5mm for the top and second rings, and 3.0mm for the oil ring.
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

This is a Manley Performance steel top piston ring set designed for Chevy Small Block LS series engines with a 4.125 inch bore. These rings feature a file-fit design, meaning the end gap needs to be precisely set during installation to match your specific engine build. This level of adjustability is crucial for optimal performance and sealing in high-performance applications.

The top ring is made of steel for durability, and the set includes rings with dimensions of 1.5mm for the top and second rings, and 3.0mm for the oil ring. This configuration is common in many LS engine builds where a balance of sealing and oil control is needed. Manley is known for well-built engine components, and this ring set is a solid option for anyone rebuilding or modifying their LS engine.

Please note that this part is not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper file fitting and installation procedures.