What does the '.020in' sizing mean for these piston rings?

The '.020in' indicates that these rings are oversize by twenty-thousandths of an inch. This means they are intended for use in cylinders that have been bored out to match this specific dimension during an engine rebuild.

Are these piston rings compatible with all Big Twin engines from 1966-1999?

These rings are specifically for Big Twin models and are designed for 3-5/8 inch pistons. It's important to verify your specific engine's piston size and model year compatibility before purchasing.

Can these piston rings be shipped to California?

No, these piston rings are not CARB approved and cannot be shipped to California due to emissions regulations.

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Specifications

Brand: S&S Cycle
Part #: 94-1222X
UPC: 94-1222X

S&S Cycle 66-99 BT 3-5/8in Piston Ring Set - .020in

Name: S&S Cycle 66-99 BT 3-5/8in Piston Ring Set - .020in
Brand: S&S Cycle
SKU: s-s-cycle-s-s-cycle-66-99-bt-3-5-8in-piston-ring-set-020in-t14-662393
Price: 55.53 USD
Availability: BackOrder

$55.53

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

S&S Cycle Big Twin piston ring set, .020in size. Essential for engine rebuilds.

Key Features

Fits 1966-1999 Big Twin motorcycles.
Designed for 3-5/8 inch pistons.
Piston rings are .020 inches oversize.
From S&S Cycle, a popular name in performance engine parts.

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About this part

Product Details

If you're rebuilding the top end of your 1966-1999 Big Twin motorcycle, a fresh set of piston rings is a critical part of the job. These rings from S&S Cycle are designed to fit 3-5/8 inch pistons and are .020 inches oversize, meaning they're intended for cylinders that have been bored out to match. Proper ring seal is key to good compression, efficient combustion, and keeping oil out of the combustion chamber.

S&S Cycle is well-known for their performance engine components, and this ring set is built to perform. The .020 inch sizing is specific, so make sure your cylinders have been machined to this dimension before installation. Getting the rings seated correctly is important for their longevity and the overall health of your engine.