Upgrade stages from 255 to 265 Hp for the TBi engine found in Alfa Romeo 159. 

Stage 1 & Stage 2 upgrades, are presented below.

Stock engine specs:    

Capacity: 1742cc                           
bore x stroke: 83 x 80.5 (mm)
Compression ratio: 9.5:1
Turbocharger: KKK K03

Full boost: 1.3bar@2000 rpm
Constant pressure:1bar
Pressure at revlimit:0.7bar
Revlimit: 6500 rpm

Power: 200hp
Torque: 320Nm

Stage 1: 

Engine upgrades:

-Stage 1 Software upgrade

Engine performance:

Full boost: 1.55bar@2000 rpm 
Constant pressure:1.35bar 
Pressure at revlimit:1bar 
Revlimit: 6500 rpm

Power: 255hp
Torque: 380Nm

Stage 2:

Engine upgrades:

-Full 63.5mm exhaust 
-Air filter
-Stage 2 Software upgrade

Engine performance:

Full boost: 1.65bar@2000 rpm 
Constant pressure:1.45bar 
Pressure at revlimit:1.25bar 
Revlimit: 6500 rpm

Power: 265hp
Torque: 400Nm

Dyno:

Software upgrades:

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

Use of 95/100 octane fuel is mandatory.