What does 'file-fit' mean for these piston rings?

File-fit rings are not pre-gapped to a specific cylinder bore size. This means you'll need to carefully measure your cylinder bore and then file down the ends of the rings to achieve the correct gap. This allows for a custom fit, which is important for performance and sealing.

What is the benefit of the plasma moly coating on the top ring?

The plasma moly coating on the top ring helps to reduce friction and wear. It also contributes to a better seal against combustion pressure, which can lead to improved horsepower and engine durability.

Are these rings suitable for all engine builds?

These rings are designed for 8-cylinder engines and are file-fit, making them suitable for performance builds where precise gap adjustment is desired. However, they are not CARB approved and cannot be shipped to California.

JE Pistons Ring Set 1.2-1.5-3mm MOLY J751F8-4145-5

Name: JE Pistons Ring Sets 1.2-1.5-3mm MOLY
Brand: JE Pistons
SKU: je-pistons-je-pistons-ring-sets-1-2-1-5-3mm-moly-t14-297433
Price: 324.99 USD
Availability: BackOrder

JE Pistons Ring Sets 1.2-1.5-3mm MOLY

$324.99

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

JE Pistons ring set with 1.2-1.5-3mm MOLY configuration. Features carbon steel plasma moly top ring for improved sealing.

Key Features

Fits 8-cylinder engines.
Top ring is 0.0472 in. carbon steel with plasma moly coating.
Second ring is 0.0591 in. iron phosphate.
Oil ring is 0.1181 in. carbon steel chrome standard tension.
Rings are file-fit for custom end gap adjustment.
Designed to maximize horsepower through precise combustion sealing.

⚠️ 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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Product Details

The top ring on this JE Piston set is made from carbon steel with a plasma moly coating, measuring 0.0472 inches thick. This material and coating choice is key for maximizing horsepower by ensuring a precise seal against combustion pressure within the cylinder. These rings are designed for 8-cylinder engines and come in a file-fit configuration, meaning you can fine-tune the end gap for your specific application, which is a common practice for performance builds.

This set includes a 0.0591-inch thick iron phosphate second ring and a 0.1181-inch thick carbon steel chrome standard tension oil ring. The combination of these specific ring thicknesses and materials works together to manage oil consumption and maintain cylinder wall integrity. JE Pistons is known for using the same techniques and services that top racing teams rely on, offering a well-built component that aims for reduced friction and improved durability.

Because these are file-fit rings, they require careful installation to achieve the correct end gap for your engine's bore. This level of customization is often sought after when rebuilding or modifying an engine for improved performance and reliability.