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

This means the rings are designed to fit into cylinders that have been bored out by 0.040 inches larger than their original factory size. This is common during an engine rebuild when the cylinders need to be reconditioned.

What is the benefit of the moly coating on these rings?

The moly coating helps to reduce friction between the piston ring and the cylinder wall. This can lead to improved engine performance, reduced wear, and a smoother break-in process for your rebuilt 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 makes, including AMC 199, 232, and 258ci, and Buick 225ci. It's important to verify that your engine's displacement matches the application listed for this part number.

Mahle OE Piston Rings 40668CP.030 - AMC/Jeep/Buick/Intl

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-t14-50719
Price: 53.75 USD
Availability: BackOrder

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

$53.75

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 for AMC 199/232/258, Buick 225, Intl, and Jeep engines. Part# 40668CP.030. This set is 0.040 inch undersize.

Key Features

Fits a wide range of AMC, Buick, International, and Jeep vehicles from 1964-1988.
Designed for AMC 199, 232, and 258ci engines, Buick 225ci engines, and various International and Jeep applications.
This is a 0.040 inch undersize ring set, intended for bored cylinders.
Features a moly coating to reduce friction and improve wear resistance.
Built to meet original equipment requirements for reduced oil consumption and longer service life.
Mahle OE piston rings are known for their advanced technology and reliable performance.

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Will this fit your vehicle?

Product Details

If you're rebuilding the engine in your classic American Motors, Jeep, Buick, or International truck, Mahle OE Moly Ring Set is a solid choice. This set is specifically designed for AMC 199, 232, and 258 cubic inch engines, Buick 225s, and various International and Jeep applications from the mid-60s through the late 80s. Piston rings are crucial for sealing the combustion chamber, controlling oil consumption, and transferring heat from the piston to the cylinder wall. Mahle's rings are built to meet original equipment requirements, focusing on reducing friction and minimizing oil use for a longer service life.

This particular set is a 0.040 inch undersize, meaning it's intended for cylinders that have been bored out to a larger diameter during an engine rebuild. The moly coating on these rings helps reduce friction during break-in and throughout the life of the engine, contributing to improved performance and durability. Mahle is known for its advanced piston ring technology, aiming to provide a reliable seal and efficient operation for your engine rebuild.