What does 'gapless top' mean for a piston ring?

A gapless top piston ring has ends that meet without a gap when installed in the cylinder bore. This design creates a more effective seal against combustion pressure compared to conventional rings with a small gap, which can help improve compression and reduce blow-by.

Why can't these rings ship to California?

These piston rings are not CARB (California Air Resources Board) approved. This means they do not meet California's emissions standards, and therefore, cannot be legally shipped to or sold within the state of California.

What are the dimensions of these piston rings?

These rings are designed for a 4.500 inch bore. The top ring has a thickness of 1/16 inch, and the second ring has a thickness of 3/16 inch.

Specifications

Brand: Manley Performance
Part #: 46450GT-8
UPC: 807298072265

Manley Piston Ring, RING-4.500 1/16,3/16 GAPLESS TOP

Name: Manley Piston Ring, RING-4.500 1/16,3/16 GAPLESS TOP
Brand: Manley Performance
SKU: manley-performance-manley-piston-ring-ring-4-500-1-16-3-16-gapless-top-t14-881394
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 4.500" bore gapless top piston rings. Not CARB approved.

Key Features

This product is a set of Manley Performance gapless top piston rings.
Designed for a 4.500 inch bore.
Features a 1/16 inch top ring thickness.
The second ring thickness is 3/16 inch.
The gapless design creates a tighter seal in the cylinder.
Not CARB approved and 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 listing is for a set of Manley Performance gapless top piston rings designed for a 4.500 inch bore. These rings are engineered to provide a tight seal at the top of the piston, which is crucial for maximizing compression and preventing blow-by. The gapless design means the ring ends meet without a gap, creating a more effective seal compared to conventional rings, especially under high cylinder pressures.

Manley is known for producing well-built internal engine components, and these piston rings are no exception. They are constructed from durable materials suitable for demanding engine builds. The specific dimensions, a 1/16 inch thickness for the top ring and 3/16 inch for the second ring, are common in performance applications where precise fitment is key to engine efficiency and longevity. Proper installation is vital for these types of rings to perform as intended and prevent premature wear.

Please note that these piston rings are not CARB approved and cannot be shipped to California. Always consult your engine builder or a qualified mechanic to ensure these rings are the correct specification for your specific engine build and application.