The KK chassis is certified with approval number 033-CH-05 starting from the 2022 season. The new FIA Karting regulations introduced in 2018 provide that new approvals last indefinitely, provided that the manufacturers renew their validity annually by paying the relative approval fee (To learn more, read, "Dossier | FIA approvals: what they are, what they are for, how long they last... the ultimate guide!").
KK is a chassis mainly dedicated to the Direct Drive classes (such as those established by FIA Karting for OK and OKJ, but also the main single-brand ones: Rotax Max Challenge, IAME Series, ROK Cup, etc.). However, a version of this chassis prepared for the use of Shifter engines can be purchased, equipped with everything necessary for mounting the gear lever. The purchase in the "gear" version makes dual use possible.