Roush Stage 1 is equal to Mustang GT MSRP* + $9,035 + Options.
Roush Stage 2 is equal to Mustang GT MSRP* + $11,245 + Options.
Roush Stage 3 is equal to Mustang GT MSRP* + $20,225 + Options.
*The Mustang GT MSRP ranges from 26 to 28K depending on options.