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

This means the rings are designed for cylinders that have been bored out by 0.030 inches during an engine rebuild. It's important to match the ring size to the cylinder bore size for a proper seal.

Are these rings suitable for all GMC 230/250 engines from 1969-1979?

Yes, this set is designed to fit GMC 230 and 250 cubic inch engines within the 1969-1979 model years. Always confirm your specific engine displacement and year range.

What is the benefit of chrome plating on piston rings?

Chrome plating provides a hard, durable surface that resists wear and helps maintain a good seal against the cylinder wall. This contributes to reduced oil consumption and longer ring life.

Mahle OE Piston Rings 40975.030 - GMC 230/250 1969-1979

Name: Mahle Rings GMC 230/250 69-79 Chrome Ring Set
Brand: Mahle OE
SKU: mahle-oe-mahle-rings-gmc-230-250-69-79-chrome-ring-set-t14-49346
Price: 50.52 USD
Availability: BackOrder

Mahle Rings GMC 230/250 69-79 Chrome Ring Set

$50.52

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 0.030 inch undersize chrome piston ring set for GMC 230/250 engines. Fits 1969-1979.

Key Features

Fits 1969-1979 GMC 230 and 250 cubic inch engines.
This is a 0.030 inch undersize piston ring set.
Chrome ring plating offers a durable surface for good sealing.
Designed to reduce friction and minimize oil consumption.
Built to meet original equipment requirements for reliable performance.
Fits a wide range of classic Chevrolet and GMC vehicles.

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Will this fit your vehicle?

Product Details

If you're rebuilding the engine in your classic truck or muscle car, Mahle OE piston rings are a solid choice. This set, part number 40975.030, is specifically designed for GMC 230 and 250 cubic inch engines from 1969 through 1979. These rings are 0.030 inch undersize, meaning they're intended for cylinders that have been bored out to match this dimension during an engine rebuild.

Mahle OE rings are built to meet the demands of original equipment specifications. They focus on reducing friction within the cylinder, which helps minimize oil consumption and can contribute to a longer service life for your engine. The chrome plating on these rings offers a durable surface that works well with cylinder walls, helping to ensure a good seal and efficient operation.

This set fits a wide range of vehicles from that era, including popular models like the Chevrolet Camaro, Chevrolet C10 Pickup, and Chevrolet El Camino. When you're putting an engine back together, using well-made components like these Mahle rings is key to a successful rebuild.