I've never heard of renting one...i think Summit might sell them. Do you know what all this process calls for? The way i've always understood it to be done is, you remove the valves from your heads and the cutting tools (which look kinda like valves only with an aggressive cutting/abraisive head) goes in place of the valve...one tool for the intake and one for the exhaust, and you hook that to a drill and cut the relief out. Anyways....that's for 16 valves...lots of work. I've been interested in doing it but damn that's a lot of work.