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 with pistons that have been machined to a slightly smaller diameter, often after cylinders have been bored or honed during an engine rebuild.

Are these rings compatible with all 4.5L and 4.9L engines?

This set is specifically designed for certain Cadillac and GMC vehicles from the late 1980s and early 1990s that use the 4.5L or 4.9L engines. It's crucial to verify the fitment guide for your exact vehicle make, model, and year to ensure compatibility.

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

Mahle OE piston rings are engineered to meet original equipment standards, focusing on reducing engine friction and minimizing oil consumption. This design approach helps to ensure efficient engine operation and can contribute to a longer service life for your engine components.

Mahle Piston Ring Set 51556CP.020 - 4.5L 4.9L Engines

Name: Mahle Rings GMC Pass 273 4.5L Eng 88-92 300 4.9L Eng 91-94 Plain Ring Set
Brand: Mahle OE
SKU: mahle-oe-mahle-rings-gmc-pass-273-4-5l-eng-88-92-300-4-9l-eng-91-94-plain-ring-s-t14-49265
Price: 72.52 USD
Availability: BackOrder

Mahle Rings GMC Pass 273 4.5L Eng 88-92 300 4.9L Eng 91-94 Plain Ring Set

$72.52

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 Ring Set 51556CP.020 for 4.5L and 4.9L engines. Reduces friction and oil consumption.

Key Features

Fits 1988-1995 Cadillac DeVille, 1989-1992 Cadillac Allante, and other select Cadillac and GMC models.
Designed for 4.5L and 4.9L engines.
Piston rings are 0.020 inches undersize.
Built to meet original equipment requirements.
Focuses on reducing friction and minimizing oil consumption.
Aims to provide longer service life for the engine.

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Will this fit your vehicle?

Product Details

These Mahle OE piston rings are 0.020 inches undersize, meaning they are designed to fit pistons that have been machined to a slightly smaller diameter. This is important when rebuilding an engine, especially if the cylinders have been honed or bored. Mahle rings are built to meet original equipment requirements, focusing on reducing friction and minimizing oil consumption for a longer service life. They are a popular choice for engine rebuilds on a range of vehicles.

Mahle engineers these rings with advanced technology to help your engine run more efficiently. By reducing friction between the piston and cylinder wall, they help improve performance and can contribute to better fuel economy. The design also helps to seal the combustion chamber effectively, which is key to preventing oil from entering the combustion process and being burned. This attention to detail means you get a well-built part that's ready to go into your engine rebuild.

This ring set is designed for specific GMC and Cadillac engines, including the 4.5L and 4.9L displacements found in models like the Cadillac DeVille and Commercial Chassis from the late 80s and early 90s. Always check the fitment guide to ensure these rings are the correct size and application for your specific engine build.