Approximately 300 laps on it. Was in a Street Stock oval stock car. Part# is F890583AX. It is the polished and lighten one and was set professionally by LP Gear. Picture worth 1000 words, take close look at it $175. I do not have 3rd member case. Also have complete 9" ford rear end that came out of the Camaro. See pic's includes calipers, rotors, axles but has one hub missing $500. Have pair of dirt Camaro leaf spring 175 & 200 rating $75.