The tuning stages vary from 680 to 720 hp for the 4.0TFSI engine of Audi RS6.

Stage 1 & Stage 2 upgrades,are presented below.

Stock engine specs:

Capacity: 3993cc
bore x stroke: 84.5 × 89 (mm)
Compression ratio: 9.3:1

Power: 560hp
Torque: 700Nm

Stage 1:

Engine upgrades:

-Stage 1 Software upgrade

Engine performance:

Power: 680hp
Torque: 900Nm

Stage 2:

Engine upgrades:

-Free flow air intake system
-Full exhaust
-Stage 2 Software upgrade

Engine performance:

Power: 720hp
Torque: 1000Nm

Software upgrades:

Boost control is achieved using the OEM ECU and N75 valve.

Use of 95/100 octane fuel is mandatory.