2021 BMW M3 vs 2017 Ford Mustang GT BMW M3 Mods: JB4 piggyback tune using maps in 93 octane *Manual transmission Ford Mustang GT Mods: Intake manifold Intake Longtube headers Midpipe Catback exhaust E85 tune *Manual transmission 1st race was from 60 MPH 2nd race was from 40 MPH IF YOU LIKED THE VIDEO, PLEASE GIVE IT A THUMBS UP, SHARE, AND SUBSCRIBE FOR MORE 😇