These were spare rear rocker arms and rear sway bars from an 1988 IMSA GTU RX-7 campaigned by Overton Autopsort and sometimes driven by Lance Stewart. The car had a Hewland rear DG 300 style differential. The car was designated as the Alien by all who knew her. The car was originally built by Clayton Cunnigham Racing. The parts are beautiful pieces hand made from 4130 material and beautifully welded by one of the best.