Good morning everyone. When I purchased my roush I had never seen a 99-04 before and knew nothing about them. Honestly I didn't like the look of any of the new edge mustangs... Until I saw this 1! I first confirmed it was real and negotiated a price. The owner said that the original owner ordered it as a stage 2 but had roush add a pro charger. Roush said that if it is born a stage 2 it will always be a stage 2. They could neither confirm or deny they added it because they didn't have any records on it. Could it be possible that they installed a pro charger instead of a whipple? Personally I believe it was added later but it's still an awesome car.