What is the primary function of a second compression ring?

The second compression ring works in conjunction with the top ring to seal the combustion chamber. It also helps to scrape excess oil from the cylinder wall, preventing it from entering the combustion chamber and burning.

What does 'standard gap' mean for these piston rings?

A standard gap means the ring is manufactured with a typical clearance for its bore size. This is suitable for most general engine rebuilds, but always consult your engine's service manual to ensure it meets the specific requirements for your application.

Why are these rings not CARB approved?

Some engine components are not approved by the California Air Resources Board (CARB) due to emissions standards. As a result, this product cannot be shipped to California addresses.

Mahle OE Piston Rings 3021041B - 4.360in Standard Gap

Name: Mahle Rings 4.3600in X 5/64in EW Grey Iron RBT Std Gap Second Ring Plain Ring Set (48 Qty Bulk Pack)
Brand: Mahle OE
SKU: mahle-oe-mahle-rings-4-3600in-x-5-64in-ew-grey-iron-rbt-std-gap-second-ring-plai-t14-51092
Price: 274.71 USD
Availability: BackOrder

Mahle Rings 4.3600in X 5/64in EW Grey Iron RBT Std Gap Second Ring Plain Ring Set (48 Qty Bulk Pack)

$274.71

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 4.360in standard gap second ring set. Grey iron construction for durability.

Key Features

This is a Mahle OE 4.360-inch standard gap second ring set.
Each ring has a 5/64-inch width, a common size for the second compression ring.
Constructed from grey iron for good durability and heat resistance.
Includes 48 rings in a bulk pack, suitable for multiple engine builds.
Features a standard gap, making it suitable for many common engine applications.
Not CARB approved; cannot be shipped to California.

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Product Details

If you're rebuilding an engine and need a reliable set of second compression rings, this Mahle OE bulk pack is a solid option. These rings are designed to seal the combustion chamber effectively, working with the top ring to manage oil and prevent blow-by. The 4.360-inch bore size is common in many larger displacement engines, and the 5/64-inch width is a standard dimension for the second ring groove.

Mahle uses grey iron for these rings, which is a well-known material for its durability and ability to handle the heat and pressure inside a cylinder. This particular set features a standard gap, meaning it's ready for most typical engine builds without needing custom sizing. Having 48 rings in this bulk pack means you'll have plenty on hand for multiple engine projects or if you need spares during a complex rebuild.

Remember that these rings are not CARB approved and cannot be shipped to California. Always refer to your specific engine's service manual for proper installation procedures and any other components you might need for your rebuild.