CP 1.2mm Nitrided Back Cut Top Ring 4.000 bore

This 1.2mm top ring from CP Pistons features a nitrided surface treatment, which is a hard, wear-resistant finish applied to the steel. This process helps the ring stand up better to the heat and friction it encounters in the cylinder bore. The back cut design is a specific machining detail that can help the ring seal more effectively under certain pressure conditions, especially in high-performance applications. This ring is made to fit a 4.000-inch bore diameter.

CP Pistons is known for making well-built engine components, and these rings are no exception. The nitriding process is a key feature here, as it significantly increases the surface hardness of the ring, making it more resistant to scuffing and wear over time. This can lead to a longer-lasting seal and better engine performance. It's a solid option if you're rebuilding an engine and need reliable piston rings for a 4.000-inch bore.