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Est. 1957
Manley Performance

Manley Piston Ring, RING-99.5mm/3.917 1.5,3mm GAPLESS TOP

$666.12

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Manley Performance gapless top piston ring set for 99.5mm bore. Improves sealing for better engine performance.

Key Features

  • Fits a 99.5mm (3.917 inch) cylinder bore.
  • Features a gapless top ring design for superior sealing.
  • Top ring measures 1.5mm in thickness.
  • Second ring measures 3.0mm in thickness.
  • Manley Performance is a well-known brand in performance engine components.
  • Not CARB approved; cannot ship to California.
This piston ring is designed for a 99.5mm bore. Please consult your engine's specifications or a professional to confirm compatibility with your specific application.

⚠️ 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 gapless top piston ring is built with a unique design that eliminates the traditional gap found in most piston rings. This gapless construction means the ring forms a continuous seal around the cylinder wall, preventing combustion gases from escaping past the piston. This is crucial for maximizing cylinder pressure and improving overall engine efficiency, especially in high-performance applications where every bit of power counts. The ring measures 99.5mm in diameter, with specific dimensions of 1.5mm for the top ring and 3.0mm for the second ring, designed to fit precisely into the piston groove.

Manley Performance is known for using strong materials and solid construction in their engine components, and these gapless rings are no exception. The gapless design is a notable engineering choice that raises the bar for sealing performance compared to standard rings. This improved seal helps maintain consistent cylinder pressure, which translates to more reliable power delivery and can contribute to better fuel economy under certain conditions. Because there's no gap for combustion blow-by, you'll see a more efficient transfer of power from the combustion chamber to the crankshaft.

When rebuilding or modifying an engine, especially one where you're aiming for maximum performance and reliability, piston rings are a critical component. These gapless rings are a popular choice for builders who want to ensure the best possible seal. Keep in mind that this part is not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures to get the most out of this advanced engine component.

Specifications

Brand
Manley Performance
Manufacturer Part #
46120GT-8
UPC
807298071930

Frequently Asked Questions

Manley Piston Ring, RING-99.5mm/3.917 1.5,3mm GAPLESS TOP

$666.12