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

A gapless top ring has its ends joined together, meaning the ring ends can never align. This design provides a continuous seal against the cylinder wall, preventing combustion gases from blowing past the ring. This is especially beneficial in high-performance or boosted engines where maintaining cylinder pressure is crucial for power.

What does the 1.5, 3mm sizing refer to?

This refers to the thickness of the piston rings. The '1.5' indicates the top compression ring is 1.5mm thick, and the '3mm' indicates the second compression ring is 3.0mm thick. These are common dimensions for performance engine builds.

Are these rings compatible with all engine builds?

These rings are specifically designed for performance engine builds requiring precise sealing and durability, particularly those with high compression or forced induction. It's essential to ensure they match your specific piston design and overall engine configuration. They are not CARB approved and cannot be shipped to California.

Specifications

Brand: Manley Performance
Part #: 46112GT-8
UPC: 807298071862

Manley Piston Ring, RING-4.020 1.5,3mm GAPLESS TOP

Name: Manley Piston Ring, RING-4.020 1.5,3mm GAPLESS TOP
Brand: Manley Performance
SKU: manley-performance-manley-piston-ring-ring-4-020-1-5-3mm-gapless-top-t14-881456
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 4.020" gapless top piston ring set. Essential for performance engine builds.

Key Features

Fits 4.020 inch bore size.
Gapless top ring design prevents blow-by for improved sealing.
Features a 1.5mm top ring and a 3.0mm second ring.
Constructed from strong materials for durability in performance engines.
Designed for high-compression and boosted engine 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 set includes the Manley Performance 4.020 inch gapless top piston rings, featuring a 1.5mm top ring and a 3.0mm second ring. These rings are specifically designed for high-performance engine builds where precise sealing and durability are critical. The gapless top ring design is a notable feature, engineered to prevent blow-by by ensuring the ring ends never align, maintaining a continuous seal under extreme combustion pressures. This is particularly important for boosted or high-compression applications where maintaining cylinder pressure is key to power output.

Manley Performance is known for producing well-built engine components, and these piston rings are no exception. They are constructed from strong materials chosen for their ability to withstand the harsh environment inside a combustion chamber. The specific dimensions, 4.020 inch bore size with a 1.5mm top and 3.0mm second ring configuration, are common in many performance engine builds, making them a popular choice for engine builders looking for reliable, high-performance ring sets. The gapless top ring design offers an improved sealing solution over traditional gap designs, helping to maximize power and efficiency.

When considering these rings, it's important to note that they are not CARB approved and cannot be shipped to California. Additionally, they are subject to California's Prop 65 warning. For optimal performance and longevity, ensure these rings are installed by a qualified technician following precise clearances and lubrication guidelines specific to your engine build.