In 1981 GPI purchased the 2-Cycle division of Kohler. In 1984 the GPI line of pistons was developed using the latest in materials and design which are continuously being upgraded. All rings fit original pistons and can be purchased separately. GPI also stocks OEM rings for most pistons (Nippondenso and Elko).

Approximately 175 different pistons are on hand for Arctic Cat, CCW, Cuyuna, Evinrude-Johnson, Fuji, Hirth, JLO, Kawasaki, Kioritz, Kohler, Polaris, Rotax, Sachs, Tahatsu, Yamaha, Zenoah and Wankel. Carburetor parts are stocked for Lectron, Mikuni, Tillotson, and Walbro. We have a large inventory of Kohler (fan and liquid cooled) engines. Ignition parts are carried for Bosch, Denso, Kokuson, Nippondenso, and Sawafuji and CDI boxes for most makes.