750hp GIAC Audi RS7 vs BMW M5 F10 - Onboard at Shift S3ctor

We jump on board an Audi RS7 complete with GIAC tune to 750hp running on MS109 fuel and an Akrapovic exhaust system to hit the half mile runway at Shift S3ctor Airstrip Attack 7, up against a BMW F10 M5 also with tune and race fuel. Thanks for watching, Tim