What does 'file-fit' mean for the top ring?

A file-fit top ring means the ring is not pre-gapped to a specific size. You will need to carefully measure your cylinder bore and use a ring grinder or file to achieve the correct end gap for your engine's specific bore size and application. This allows for a more precise seal.

What is the advantage of plasma moly and iron phosphate rings?

Plasma moly and iron phosphate coatings are chosen for their durability and ability to reduce friction. The plasma moly top ring offers excellent wear resistance and sealing, while the iron phosphate second ring helps with oil control and further improves sealing.

Are these rings suitable for a high-performance engine build?

Yes, JE Pistons is known for high-performance engine components. The materials and design of this ring set, including the file-fit top ring and durable coatings, are intended to maximize horsepower and improve ring seal in demanding applications.

JE Pistons Ring Sets 1.2-.043-3mm MOLY J941F8-4125-5

Name: JE Pistons Ring Sets 1.2-.043-3mm MOLY
Brand: JE Pistons
SKU: je-pistons-je-pistons-ring-sets-1-2-043-3mm-moly-t14-297818
Price: 319.99 USD
Availability: BackOrder

JE Pistons Ring Sets 1.2-.043-3mm MOLY

$319.99

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 sets are known for high-performance engine components. This MOLY set is 1.2-.043-3mm and designed for precision sealing.

Key Features

Fits 8-cylinder engines.
Features a file-fit top ring for custom gapping.
Top ring is 0.0472 inch carbon steel plasma moly.
Second ring is 0.043 inch iron phosphate.
Oil ring is 0.1181 inch carbon steel chrome standard tension.
Designed to maximize horsepower through precision 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

JE Pistons is well-known for making high-performance engine components, and these piston ring sets are a great example of that. They're built to maximize horsepower by precisely sealing combustion pressure, which is crucial for any engine rebuild or performance build. This particular set is designed for an 8-cylinder engine and features a file-fit top ring, meaning you can fine-tune the gap for your specific application, which is a common practice among professional engine builders.

The construction here is solid: a carbon steel plasma moly top ring at 0.0472 inches thick, paired with a 0.043-inch iron phosphate second ring. For the oil control, you get a 0.1181-inch carbon steel chrome standard tension oil ring. This combination is chosen to balance sealing, durability, and reduced friction. These are the same types of services and materials used by top racing teams, aiming for improved durability and power gains through better ring seal and less friction.

Keep in mind that these rings are not CARB approved and cannot be shipped to California. If you're rebuilding an engine and want a well-built set of rings that can be precisely fitted, this JE Pistons set is a strong option.