What does 'gapless top ring' mean?

A gapless top ring means the ends of the ring meet without any gap when installed in the piston groove. This design prevents combustion gases from escaping past the piston, leading to improved cylinder sealing and potentially more power.

What is the significance of the .043" top ring and 3/16" oil ring sizes?

These specific dimensions are chosen for their ability to create a strong seal in the cylinder. The .043" top ring is a common size for performance applications, and the wider 3/16" oil ring is effective at controlling oil and preventing it from entering the combustion chamber.

Why are these rings not CARB approved?

These piston rings are not approved by the California Air Resources Board (CARB) for use in emissions-controlled vehicles in California. Consequently, they cannot be shipped to addresses within California.

Specifications

Brand: Manley Performance
Part #: 46550GT-8
UPC: 807298072302

Manley Piston Ring, RING-4.500 .043,3/16 GAPLESS TOP

Name: Manley Piston Ring, RING-4.500 .043,3/16 GAPLESS TOP
Brand: Manley Performance
SKU: manley-performance-manley-piston-ring-ring-4-500-043-3-16-gapless-top-t14-881399
Price: 666.12 USD
Availability: BackOrder

$666.12

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 gapless top piston rings for 4.500" bore. .043" top ring, 3/16" oil ring.

Key Features

Fits 4.500 inch bore size.
Gapless top ring design prevents combustion gas blow-by.
Top ring measures .043 inches thick.
Oil ring measures 3/16 inches wide.
Designed for high-performance engine builds where sealing is critical.

⚠️ 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

Manley Performance is well-known for making strong internal engine components, and these gapless top piston rings are a prime example of that focus. If you're building or rebuilding an engine where sealing is absolutely critical, these rings are designed to help you achieve that goal. They feature a gapless top ring design, which means the ends of the ring meet without a gap, preventing combustion gases from blowing past the piston. This design is particularly beneficial for high-performance applications where maximizing cylinder pressure and efficiency is key.

These rings are built for a 4.500 inch bore size. The top ring measures .043 inches thick, and the oil ring is a substantial 3/16 inches wide. This combination is chosen for its ability to create a solid seal and effectively control oil in the cylinder. The gapless top ring design is a notable step up from conventional rings, as it eliminates the primary leak path for combustion pressure. This improved sealing can lead to better power output and more consistent engine operation, especially under demanding conditions. When you're putting together a serious engine build, the details matter, and these rings address a critical detail in piston and cylinder sealing.

It's important to note that these rings are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper ring gap setting and piston installation procedures to ensure optimal performance and longevity of your engine build.