What does the 0.040 inch undersize mean for these piston rings?

The 0.040 inch undersize indicates that these rings are designed for an engine cylinder that has been bored out by 0.040 inches beyond its original factory specification. This is common during engine rebuilds when cylinders have wear or damage that requires machining.

What is the benefit of the moly coating on the top ring?

The moly (molybdenum) coating on the top ring helps to reduce friction between the ring and the cylinder wall. This leads to improved engine efficiency, less wear over time, and can contribute to a longer service life for the rings and the engine.

Are these rings compatible with all AMC, Jeep, and Buick engines from the specified years?

This ring set is designed for specific engine displacements within those brands, such as the AMC 199, 232, 258, and Buick 225. It's important to verify that your vehicle's engine matches one of the compatible engine types listed in the fitment data to ensure proper fitment.

Mahle OE Piston Rings 40668CP.040 - AMC/Jeep/Buick

Name: Mahle Rings AMC 199/232/258 Engs 64-87 Buick 225 Eng 64-67 Gray Int Trk Jeep Moly Ring Set
Brand: Mahle OE
SKU: mahle-oe-mahle-rings-amc-199-232-258-engs-64-87-buick-225-eng-64-67-gray-int-trk-t14-50720
Price: 101.15 USD
Availability: BackOrder

Mahle Rings AMC 199/232/258 Engs 64-87 Buick 225 Eng 64-67 Gray Int Trk Jeep Moly Ring Set

$101.15

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 Moly Ring Set, 0.040 inch undersize, for AMC 199/232/258 and Jeep/Buick engines. Reduces friction and oil consumption.

Key Features

Fits AMC 199, 232, and 258 cubic inch engines from 1964-1987.
Fits Buick 225 cubic inch engines from 1964-1967.
Fits various Jeep models including CJ5, CJ7, and Cherokee from 1965-1986.
Features a moly coating on the top ring for reduced friction and improved wear resistance.
This is a 0.040 inch undersize ring set, intended for bored engine cylinders.
Designed to minimize engine oil consumption and extend service life.

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Will this fit your vehicle?

Product Details

These Mahle piston rings are made with a moly coating on the top ring, which helps reduce friction and wear in the cylinder bore. This set is specifically sized at 0.040 inch undersize, meaning it's intended for engines that have been bored out to match this dimension during a rebuild. They are designed to fit a wide range of AMC, Jeep, and Buick engines from the mid-1960s through the late 1980s, including popular models like the Jeep CJ series, AMC Concord, and Buick Skylark.

Mahle OE rings are built to meet the demands of original equipment requirements, focusing on minimizing oil consumption and extending the life of your engine. The advanced design helps reduce overall ring mass and friction, contributing to a more efficient and durable engine. When you're rebuilding an engine from this era, using well-built piston rings like these is crucial for ensuring proper sealing and performance.

This set is a solid option for anyone undertaking an engine overhaul on compatible AMC, Jeep, or Buick vehicles. Always refer to your vehicle's specific service manual for detailed installation procedures and specifications.