The 2.0T engine from Opel Astra OPC is defined by square shape (86 x 86mm) and has a Borg Wagner KKK K04 turbocharger. Upgrade stages from 275 to 290 hp.

Stage 1 & Stage 2 upgrades, are presented below.

Stock engine specs:    

Capacity: 1998cc                           
bore x stroke: 86 x 86 (mm)
Compression ratio: 8.8:1
Turbocharger: KKK K04

Full boost: 1bar@2400 rpm
Constant pressure:0.8bar
Pressure at revlimit:0.6bar
Revlimit: 6500 rpm

Power: 240hp
Torque: 320Nm

Stage 1: 

Engine upgrades:

-Stage 1 Software upgrade

Engine performance:

Full boost: 1.2bar@2400 rpm 
Constant pressure:0.9bar 
Pressure at revlimit:0.7bar 
Revlimit: 7000 rpm

Power: 275hp
Torque: 400Nm

Stage 2:

 Engine upgrades:

-Air filter
-Full 70mm exhaust
-Bigger intrercooler
-Stage 2 Software upgrade

Engine performance:

Full boost: 1.5bar@4000 rpm 
Constant pressure:1.3bar 
Pressure at revlimit:0.9bar 
Revlimit: 7000 rpm

Power: 295hp
Torque: 450Nm

Software upgrades:

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

Use of 95/100 octane fuel is mandatory.