What is the purpose of piston rings?

Piston rings have a few key jobs: they seal the combustion chamber to prevent gases from leaking past the piston, they transfer heat from the piston to the cylinder wall for cooling, and they regulate the amount of oil on the cylinder wall to lubricate the piston and rings.

What does '0.030 inch undersize' mean for these rings?

This means the rings are manufactured to be 0.030 inches smaller in diameter than standard size. This size is typically used when the engine's cylinders have been bored out by 0.030 inches during a rebuild to restore proper piston-to-wall clearance.

Are these rings suitable for all GM engines from 1962-1976?

This specific set is designed for GM 409, 425, and 455 cubic inch V8 engines within that year range. It's important to verify that your engine displacement matches the application for correct fitment.

Mahle OE Piston Rings 50449.030 - GM 409/425/455 1962-1976

Name: Mahle Rings GM 409/425/455 62-76 Plain Ring Set
Brand: Mahle OE
SKU: mahle-oe-mahle-rings-gm-409-425-455-62-76-plain-ring-set-t14-49403
Price: 94.53 USD
Availability: BackOrder

Mahle Rings GM 409/425/455 62-76 Plain Ring Set

$94.53

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 50449.030 piston ring set for GM 409/425/455 engines (1962-1976). Reduces friction and oil consumption for longer engine life.

Key Features

Fits 1962-1976 GM 409, 425, and 455 cubic inch V8 engines.
This is a 0.030 inch undersize piston ring set.
Designed to reduce engine friction and oil consumption.
Built to meet original equipment manufacturer requirements.
Helps ensure proper piston-to-cylinder wall sealing for optimal engine performance.
Contributes to longer engine service life.

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Will this fit your vehicle?

Product Details

When you're rebuilding the top end of your GM engine, this Mahle OE Plain Ring Set gives you the essential components to get your pistons sealed up right. This set includes the piston rings needed for your specific engine build, designed to work with GM 409, 425, and 455 cubic inch V8s from the 1962 to 1976 model years. Mahle's rings are built to meet original equipment requirements, focusing on reducing friction and minimizing oil consumption for a longer-lasting engine.

These rings are a well-built option for your engine project. Mahle engineers them to reduce friction between the piston and cylinder wall, which can also help improve fuel efficiency and reduce overall wear. By minimizing oil consumption, these rings help keep your exhaust cleaner and prevent excessive oil burning. This particular set is 0.030 inches undersize, meaning it's intended for cylinders that have been bored out by that amount during an engine rebuild.

This set fits a wide range of GM vehicles from the mid-60s to the mid-70s, including popular models like the Buick Electra, Chevrolet Impala, and Oldsmobile Delta 88. Always refer to your vehicle's service manual for specific installation procedures and torque specifications.