What does the '.020' in the part number mean?

The '.020' indicates that these piston rings are 0.020 inches undersize. This means they are intended for use when the engine's cylinder bores have been machined to be 0.020 inches larger than their original factory size during an engine rebuild.

What vehicles does this specific ring set fit?

This Mahle OE ring set is designed for specific Buick 400, Oldsmobile 400, and Pontiac 428 engines. Examples of vehicles that use these engines include the 1975 Buick LeSabre, 1975 Oldsmobile 98, and 1967-1978 Pontiac Bonneville.

Are these rings suitable for a standard engine rebuild?

Yes, these Mahle OE rings are designed to meet original equipment requirements for reducing friction and oil consumption, making them a suitable choice for engine rebuilds where factory-level performance and reliability are desired.

Mahle OE Piston Rings 50784CP.020 - Buick Olds Pontiac

Name: Mahle Rings Buick 400 Eng 1978 Olds 400 Eng 1975 Pontiac 428 Eng 67-80 Plain Ring Set
Brand: Mahle OE
SKU: mahle-oe-mahle-rings-buick-400-eng-1978-olds-400-eng-1975-pontiac-428-eng-67-80--t14-50618
Price: 84.28 USD
Availability: BackOrder

Mahle Rings Buick 400 Eng 1978 Olds 400 Eng 1975 Pontiac 428 Eng 67-80 Plain Ring Set

$84.28

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 0.020 inch undersize piston rings for Buick 400, Olds 400, and Pontiac 428 engines. Reduces friction and oil consumption.

Key Features

Fits 1978 Buick 400, 1975 Oldsmobile 400, and 1967-1980 Pontiac 428 engines.
This is a 0.020 inch undersize piston ring set.
Designed to reduce engine friction and oil consumption.
Built to OE specifications for reliable performance.
Helps ensure proper engine compression and sealing.
Contributes to a longer service life for the engine.

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Will this fit your vehicle?

Product Details

These Mahle OE piston rings are a 0.020 inch undersize set designed for specific Buick, Oldsmobile, and Pontiac V8 engines from the late 60s through the late 70s. If you're rebuilding the top end of your engine, new piston rings are a critical component for proper sealing, compression, and oil control. These rings are built to meet the demands of original equipment specifications, focusing on minimizing friction and oil consumption for a longer service life.

Mahle OE rings are known for their advanced design, aiming to reduce friction and ring mass without sacrificing performance. This means your engine can run more efficiently, potentially using less oil and lasting longer. They are designed to fit right into the pistons for the specified Buick 400, Oldsmobile 400, and Pontiac 428 engines, making them a solid option for a rebuild where original performance and reliability are key.

This set is specifically sized at 0.020 inches undersize, which is important if your cylinder bores have been machined to this dimension during an engine overhaul. Always confirm your engine's bore size and the required ring set before ordering to ensure a proper fit and seal.