I must have a different interpretation of factory support then you because to me, A manufacturer just paying money to advertise a team (that did all the building of the car) as a Factory team with no involvement in the car itself isn't factory support, its sponsorship(Stevenson Camaro, Speedsource Mazda RX-8, Turner BMW M3) . When a Manufacturer or a company working with and contracted by the Manufacturer builds a car and supplies it and/or parts to the team, that is factory support (Pontiac GTO.R, Leighton GXP.R, Audi R8 Grand Am, Ferrari Grand-Am).