USP Audi S4 VR6 Turbo vs. Prototech 997 Turbo | USP Motorsports

For more info about USP Motorsports and what we do, visit: USP Motorsports Audi S4 VR6 Turbo: - “True Street“ | Full Dash, Driver/Pass. Seats, etc - Precision 67mm Turbo - 936whp Prototech 997 Twin Turbo: - 1300hp Kit - Big Turbos - Built Motor - E85