>To my knowledge the Audis ran the stock tub with tube framed front end >(everything in front of the firewall, easier to replace after a wreck). >I do not believe they ever used full tube-framed car. Not the IMSA Cars. I raced against both the T/A cars (Semi tube frame) and the IMSA cars (Full tube frame) Later! Eric Fletcher S.O.C. '87 5KCSTQIA2RSR2B St. Louis, Mo Steadiric@aol.com