Yes they do have steel rotors with flanges and 10 bolts on race cars. When I built 1:1 race cars ending around 2000 most of the door cars that left the shop were that way. The rotors were scalped on the inside but on a model this will not be seen. Most of the ones that had 5 bolts were street car setups. As far as drilled or slotted they both let the gas out fine on a drag car. Joe don't order the bolts I will send you some the wheels look great sanded with the 1000 grit.