The tuning stages vary from 475 to 510 hp for the 2.5TFSI engine of Audi RS3.

Stage 1 & Stage 2 upgrades, are presented below.

Stock engine specs:

Capacity: 1984cc
bore x stroke: 82.5 x 92.8 (mm)
Compression ratio: 10:1
Turbocharger: KKK

Full boost: 1bar@2500 rpm
Constant pressure: 0.8bar
Pressure at revlimit:0.5bar
Revlimit: 6500 rpm

Power: 367hp
Torque: 465Nm

Stage 1:

Engine upgrades:

-Free flow intake
-Stage 1 Software upgrade

Engine performance:

Power: 475hp
Torque: 620Nm

Stage 2:

Engine upgrades:

-Free flow air intake system
-Full 76mm exhaust
-Stage 2 Software upgrade

Engine performance:

Power: 510hp
Torque: 685Nm