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

File-fit means the end gap of the piston rings is not pre-set. You'll need to carefully file the ends to achieve the precise gap required for your specific engine bore and application, ensuring optimal sealing and performance.

What are the benefits of Moly and Plasma coating on the top ring?

The plasma moly coating on the top ring is very hard and durable, offering excellent resistance to wear. This helps maintain a consistent seal against the cylinder wall over time, contributing to sustained horsepower and engine longevity.

Are these rings suitable for high-performance or racing applications?

Yes, JE Pistons uses the same types of services and materials for these rings as are used by top professional racing teams. They are designed to maximize horsepower and durability through precise sealing and reduced friction.

JE Pistons Piston Ring Set J92608-4040-5

Name: JE Pistons Ring Sets 1.2-1.2-3mm MOLY
Brand: JE Pistons
SKU: je-pistons-je-pistons-ring-sets-1-2-1-2-3mm-moly-t14-297739
Price: 319.99 USD
Availability: BackOrder

JE Pistons Ring Sets 1.2-1.2-3mm 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 1.2-1.2-3mm MOLY. Designed for 8-cylinder engines to maximize horsepower through precision sealing.

Key Features

Fits 8-cylinder engines.
Features a file-fit design for custom gapping.
Includes a 0.0472-inch (1.2mm) carbon steel plasma moly top ring.
The second ring is 0.0472-inch (1.2mm) ductile iron phosphate.
The oil ring is 0.1181-inch (3mm) carbon steel chrome low 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

If you're rebuilding the engine in your 8-cylinder vehicle and need a solid set of piston rings, these JE Pistons are a well-built option. They're designed to seal combustion pressure effectively, which is key to getting the most horsepower out of your engine. This set features a file-fit design, meaning you can fine-tune the gap for a perfect seal in your specific cylinders.

This particular set uses a 0.0472-inch (1.2mm) carbon steel plasma moly top ring, known for its durability and ability to maintain a tight seal. The second ring is also 0.0472-inch (1.2mm) and made of ductile iron phosphate, adding to the sealing performance. For the oil ring, you get a 0.1181-inch (3mm) carbon steel chrome low-tension ring, which helps manage oil efficiently without creating excessive drag. These materials and thicknesses are chosen to work together for improved power and durability.

Keep in mind that these rings are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitting and assembly.