What does '0.040 inch undersize' mean for these piston rings?

This means the rings are manufactured to be 0.040 inches smaller in diameter than the standard size. This is typically used when engine cylinders have been bored out (honed) to a larger size during a rebuild to ensure a precise fit and proper sealing.

Are these piston rings suitable for all Ford 361 and 390 engines?

This specific set is designed for Ford 361 and 390 cubic inch engines used in Dearborn Marine, Ford Industrial, Ford Trucks, and specific Ford passenger car models between 1961 and 1971. Always verify your engine's specific application and displacement.

What is the expected service life of these Mahle piston rings?

Mahle designs their piston rings to minimize oil consumption and provide a longer service life by reducing friction and ring mass. The exact lifespan can vary based on engine maintenance and operating conditions.

Mahle OE Piston Rings 50134CP.020 - Ford 361/390 Engines

Name: Mahle Rings Dearborn Marine Ford 361/390 Engs 61-71 Ford Ind Ford Trk 360/390 Plain Ring Set
Brand: Mahle OE
SKU: mahle-oe-mahle-rings-dearborn-marine-ford-361-390-engs-61-71-ford-ind-ford-trk-3-t14-50098
Price: 51.49 USD
Availability: BackOrder

Mahle Rings Dearborn Marine Ford 361/390 Engs 61-71 Ford Ind Ford Trk 360/390 Plain Ring Set

$51.49

On Backorder

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

Mahle OE Piston Rings 50134CP.020 for Ford 361/390 engines. These are 0.040 inch undersize.

Key Features

Fits 1961-1971 Ford 361 and 390 cubic inch engines, as well as Dearborn Marine applications.
This is a 0.040 inch undersize piston ring set.
Designed to reduce friction and ring mass for improved efficiency.
Helps minimize engine oil consumption.
Built to meet OE requirements for durability and service life.

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Will this fit your vehicle?

Product Details

These Mahle OE piston rings are designed to be 0.040 inch undersize, which is important when rebuilding an engine to ensure a proper fit with honed cylinders. They are built to meet the demanding requirements of Dearborn Marine and Ford industrial, truck, and passenger car engines from 1961 through 1971, specifically for the 361 and 390 cubic inch displacements. Mahle focuses on reducing friction and ring mass, which helps minimize oil consumption and can lead to a longer service life for your engine.

When you're rebuilding a classic Ford or marine engine, getting the right piston rings is crucial for performance and longevity. Mahle's approach to piston ring technology aims to provide an improved balance between efficiency and durability. This set is designed to work with the specific piston designs found in these Ford V8 engines, ensuring a solid seal between the piston and cylinder wall.

This set is intended for engine rebuilds and is not CARB approved, so it cannot be shipped to California. Always refer to your vehicle's specific service manual for detailed installation procedures and specifications.