Keith Black Performance Pistons are a very well known source in the high performance world and produce high quality products. The KB Piston Ring sets they offer to you are a great OE like ring set made of ductile iron. The compression rings are offered in Moly, Chrome, And Plasma Moly for added strength. These KB Piston Rings will seal engines of high compression or even down to a more mild compression engine. The rings also feature standard ring end gaps for a simple installation.