What is a gapless top ring and why is it beneficial?

A gapless top ring has its ends joined together, creating a continuous seal against the cylinder wall. This design significantly reduces or eliminates blow-by, leading to more consistent cylinder pressure, improved combustion efficiency, and potentially more power.

What does the 1.5mm/3.0mm sizing refer to?

These numbers refer to the thickness of the piston rings. The 1.5mm is the thickness of the top compression ring, and the 3.0mm is the thickness of the second compression ring. These dimensions are critical for proper fitment with your pistons.

Can these rings be shipped to California?

No, these Manley Performance piston rings are not CARB approved and cannot be shipped to California due to emissions regulations.

Specifications

Brand: Manley Performance
Part #: 46118GT-8
UPC: 807298071923

Manley Piston Ring, RING-4.080 1.5,3mm GAPLESS TOP

Name: Manley Piston Ring, RING-4.080 1.5,3mm GAPLESS TOP
Brand: Manley Performance
SKU: manley-performance-manley-piston-ring-ring-4-080-1-5-3mm-gapless-top-t14-881460
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 4.080" bore.

Key Features

Fits 4.080 inch bore engines.
Features a gapless top ring design for superior cylinder sealing.
Includes a 1.5mm top ring and a 3.0mm second ring.
Constructed from durable materials for high-temperature and high-pressure environments.
Helps prevent blow-by for improved engine efficiency and consistent power.
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

Manley Performance gapless top piston rings are designed for high-performance engine builds where sealing is critical. This specific set is for a 4.080 inch bore with a 1.5mm top ring and a 3.0mm second ring, featuring a gapless top ring design. A gapless top ring means the ends of the ring are joined, creating a continuous seal against the cylinder wall. This setup is ideal for applications where maximum cylinder pressure and efficient combustion sealing are paramount, such as boosted or high-compression naturally aspirated engines.

These rings are constructed from durable materials chosen for their ability to withstand extreme temperatures and pressures found in performance engines. The gapless design helps prevent blow-by, which is when combustion gases escape past the piston rings into the crankcase. By minimizing blow-by, you achieve more consistent power delivery and better overall engine efficiency. The 1.5mm top ring and 3.0mm second ring dimensions are common in many performance applications, offering a good balance of sealing and oil control.

It's important to note that this piston ring set is not CARB approved and cannot be shipped to California. Always ensure you are using the correct ring set for your specific piston and cylinder bore size to achieve proper sealing and engine longevity. Refer to Manley's installation guidelines for precise fitting and gap setting procedures, as proper installation is crucial for the performance of gapless rings.