The tuning stages vary from 500 to 530 hp for the 4.2TFSI engine of Audi RS6.

Stage 1 & Stage 2 upgrades, are presented below.

Stock engine specs:

Capacity: 4172cc
bore x stroke: 84.5 × 93 (mm)
Compression ratio: 9.3:1

Power: 450hp
Torque: 560Nm

Stage 1:

Engine upgrades:

-Stage 1 Software upgrade

Engine performance:

Power: 500hp
Torque: 670Nm

Stage 2:

Engine upgrades:

-Free flow air intake system
-Full 70mm exhaust with 76mm downpipe including Free flow catalytic converter
-Stage 2 Software upgrade

Engine performance:

Power: 530hp
Torque: 750Nm

Software upgrades:

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

Use of 95/100 octane fuel is mandatory.