Hello ......I just got a 07 Mustang GT with a Roush supercharger and it has NOS ......my questions are what stage supercharger set up is in it ......stage 1 or stage 2....can anyone help me with this ??? I purchased it at an estate sell.......No records or anything about this car......carfax is one owner car........the Roush tag read....arb E.O. No. D418......got part number R070000021