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

This means the rings are sized to fit pistons that have been machined 0.030 inches larger than their original standard size. This is common when engine cylinders are bored out during a rebuild to clean up wear or damage.

Are these rings suitable for all 2.5L General Motors engines?

These rings are specifically designed for the General Motors 151 CID (2.5L) 4-cylinder engine used between the 1982 and 1993 model years. Always verify your engine's specific application before purchasing.

What is the benefit of reducing friction with these rings?

Reducing friction helps your engine run more efficiently, potentially leading to slightly improved fuel economy and less wear over time. It also helps the engine components last longer.

Mahle OE Piston Rings 51879CP.030 - General Motors 2.5L 4 Cy

Name: Mahle Rings General Motors 151 CID 2.5L 4 Cyl Eng 1982-93 Deep Groove Plain Ring Set
Brand: Mahle OE
SKU: mahle-oe-mahle-rings-general-motors-151-cid-2-5l-4-cyl-eng-1982-93-deep-groove-p-t14-49507
Price: 47.08 USD
Availability: BackOrder

Mahle Rings General Motors 151 CID 2.5L 4 Cyl Eng 1982-93 Deep Groove Plain Ring Set

$47.08

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 for General Motors 2.5L 4 Cyl engines (1982-93). These 0.030 inch undersize rings help reduce friction and oil consumption.

Key Features

Fits 1982-1993 General Motors 151 CID 2.5L 4-cylinder engines.
This is a 0.030 inch undersize ring set, intended for use with pistons bored 0.030 inches over.
Designed to reduce engine friction and minimize oil consumption.
Built to meet original equipment specifications for a reliable fit and function.
Features a deep groove plain ring design.

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Will this fit your vehicle?

Product Details

If you're rebuilding the top end of your engine, a fresh set of piston rings is essential for proper sealing and performance. These Mahle OE piston rings are specifically made for General Motors 151 CID (2.5L) 4-cylinder engines from 1982 through 1993. They are a 0.030 inch undersize set, meaning they are designed to fit pistons that have been bored out by 0.030 inches during an engine rebuild.

Mahle designs these rings to meet original equipment requirements, focusing on reducing friction and minimizing oil consumption for a longer service life. The deep groove plain design is a common and effective configuration for these engines. Getting the right fit and material is key to ensuring your engine runs smoothly and efficiently after the rebuild.

This set fits a wide range of popular vehicles from the 80s and early 90s, including models like the Chevrolet S10, Buick Skylark, and Pontiac Fiero. Always refer to your vehicle's specific service manual for detailed installation procedures and specifications.