Upgrade stages from 260 to 280 Hp for the 2.0T engine found in BMW 320i. 

Stage 1 & Stage 2 upgrades, are presented below.

Stock engine specs:    

Capacity: 1997cc                           
bore x stroke: 84 x 90.1 (mm)
Compression ratio: 10:1
Turbocharger: TD04

Power: 184hp
Torque: 270Nm

Stage 1: 

Engine upgrades:

-Stage 1 Software upgrade

Engine performance:

Power: 260hp
Torque: 420Nm

Stage 2:

Engine upgrades:

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

Engine performance:

Power: 280hp
Torque: 435Nm

Software upgrades:

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

Use of 95/100 octane fuel is mandatory.