Manley Piston Ring, RING-4.040 .043, 3mm

Manley Performance is well-known for making strong internal engine components, and these piston rings are a prime example. If you're rebuilding an engine and need to ensure a proper seal between your pistons and cylinder walls, these rings are a solid option. They are designed for a 4.040 inch bore and come in a .043 inch width, which is a common size for many performance applications. Getting the right ring size is critical for proper compression and oil control, and these are made to fit right.

These rings are built with durability in mind, which is important for any engine build, especially one that will see regular use. The .040 inch oversize means they are intended for cylinders that have been bored out to that dimension, often done during an engine rebuild to clean up the cylinder walls or increase displacement. This ensures a tight seal, which helps prevent blow-by and keeps oil from entering the combustion chamber. Proper ring seal is key to getting the most power and efficiency out of your engine.

It's important to note that these rings are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper ring gap setting and installation procedures to ensure optimal performance and longevity.