From the APR thread I believe both the S5 and RS4 had seats removed and better then pump gas. I know they were not on pump gas and I know for 100% sure that the Rs4 had the seats out. The S5 I remember talking to the guy who owned the car and I believe they had to remove the seats as well. To get the 11 sec pass.
So best I know the only `11 sec full interior is the JHM baby carrier