This Porsche 934 RSR Group 4 car is fitted with an original type 930/71 2994cc Turbo race engine with single K33, which we were commissioned to strip and rebuild in preparation for historic F.I.A. competition. Full race preparation included a new certified fuel bladder and renewal of every water, oil and air hose, totalling 44 meters in overall length. Further work also included a transmission rebuild and calculated ratio changes suitable for running at Le Mans Classic and finally obtaining newly-issued F.I.A HTP.