What is the purpose of the different ring widths (1.2mm, 1.5mm, 3.0mm)?

The top ring (1.2mm) handles the primary sealing of combustion pressure. The second ring (1.5mm) assists with sealing and helps scrape oil. The oil ring (3.0mm) is responsible for controlling oil flow within the cylinder bore.

Can these rings be used in any engine with an 86.5mm bore?

While these rings are made for an 86.5mm bore, they are specifically designed by Manley Performance for certain engine applications. It's important to verify compatibility with your specific engine model and build requirements.

Are these rings suitable for high-performance or racing engines?

Manley Performance is a popular brand for performance engine parts. These rings are well-built and designed for engine rebuilds, which can include performance applications, but always consult your engine builder or performance specialist for specific recommendations.

Specifications

Brand: Manley Performance
Part #: 46866-6
UPC: 807298083742

Manley 86.5mm Bore Size 1.2mm x 1.5mm x 3.0mm Ring Width Ring Set

Name: Manley 86.5mm Bore Size 1.2mm x 1.5mm x 3.0mm Ring Width Ring Set
Brand: Manley Performance
SKU: manley-performance-manley-86-5mm-bore-size-1-2mm-x-1-5mm-x-3-0mm-ring-width-ring-t14-377268
Price: 276.02 USD
Availability: BackOrder

$276.02

On Backorder — Expected to ship by May 6, 2026

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

Manley 86.5mm bore size piston ring set with 1.2mm x 1.5mm x 3.0mm ring widths. A well-built set for engine rebuilds.

Key Features

Fits 86.5mm bore size.
Features 1.2mm top ring, 1.5mm second ring, and 3.0mm oil ring.
Manley Performance is a well-known brand for engine components.
Designed for engine rebuild applications.
Not CARB approved; cannot ship to California.

⚠️ 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 Manley piston ring set features a 1.2mm top ring, a 1.5mm second ring, and a 3.0mm oil ring, designed for an 86.5mm bore size. These specific dimensions are crucial for proper sealing between the piston and cylinder wall, which directly impacts engine performance and efficiency. When you're rebuilding an engine, getting the ring dimensions exactly right is key to ensuring a good seal and preventing blow-by.

Manley Performance is known for making solid engine components, and this ring set is no exception. They are built to handle the demands of an engine rebuild, whether you're restoring a classic or building a performance motor. The precise ring widths help maintain consistent tension against the cylinder walls, which is important for both power delivery and oil control. This set is designed to fit right and perform reliably in the specified bore size.

Keep in mind that this ring set is not CARB approved and cannot be shipped to California. Always refer to your specific engine's service manual for detailed installation procedures and specifications.