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

This means the rings are designed to fit pistons that have been machined to be 0.030 inches larger in diameter than their original factory size. This is common during engine rebuilding when cylinders are bored out to restore their condition.

What is the main benefit of using Mahle OE piston rings?

Mahle OE rings are engineered to reduce friction and minimize engine oil consumption. This contributes to a longer service life for your engine and can help maintain optimal performance.

Are these piston rings compatible with all Buick, Oldsmobile, and Pontiac engines?

No, these rings are specifically designed for Buick 400, Oldsmobile 400, and Pontiac 428 engine displacements. Always verify your specific engine code and year range before purchasing.

Mahle OE Piston Rings 50784CP.030 - Buick Olds Pontiac

Name: Mahle Rings Buick 400 Eng 1978 Olds 400 Eng 1975 Pontiac 428 Eng 67-81 Plain Ring Set
Brand: Mahle OE
SKU: mahle-oe-mahle-rings-buick-400-eng-1978-olds-400-eng-1975-pontiac-428-eng-67-81--t14-50617
Price: 90.96 USD
Availability: BackOrder

Mahle Rings Buick 400 Eng 1978 Olds 400 Eng 1975 Pontiac 428 Eng 67-81 Plain Ring Set

$90.96

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

Key Features

Fits Buick 400, Oldsmobile 400, and Pontiac 428 engines.
This is a 0.030 inch undersize ring set.
Designed to reduce engine oil consumption.
Helps minimize friction within the engine.
Built for longer service life.
Mahle OE piston rings are a popular choice for engine builds.

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Product Details

These Mahle OE piston rings are 0.030 inch undersize, meaning they're built to fit pistons that have been bored out slightly from their original size. This is a common step when rebuilding an engine to ensure a fresh, tight seal. They're designed to work with Buick 400, Oldsmobile 400, and Pontiac 428 engines from various years, including popular models like the Pontiac Firebird and Oldsmobile Delta 88.

Mahle focuses on advanced ring technology to help minimize engine oil consumption and reduce friction, which can lead to longer service life for your engine components. The goal is to get a solid seal between the piston and cylinder wall, keeping combustion pressure where it belongs and preventing oil from entering the combustion chamber. This set is a well-built option for anyone rebuilding or refreshing their engine.

When you're rebuilding an engine, getting the right piston rings is crucial for proper performance and longevity. This set is designed to fit a range of Buick, Oldsmobile, and Pontiac V8 engines, making it a versatile choice for many classic builds.