Camshafts work in unison with the crank via connection through chain or belt. Their job is to open and close valves when air is needed in the combustion chamber or when exhaust is leaving through the exhaust system. They are an integral part of any engine build, or even some options allow drop in power that don't require a full valvetrain overhaul. One of the best power getting mods, we can offer install on most camshafts so please reach out for inquiries.