Josh drove in from Illinois for Purple Belt upgrades to his ATS-V coupe. He wanted the tune to be compatible with 91-octane, so we created two tunes for him. The first one automatically scales from 474 whp (on 91-octane pump gas) to 550 whp (on 91-octane E60 to E85). The second tune has his boost turned up and produces 602 whp on E60 to E70 fuel.