(By wikipedia)
Well Its 12kw = 15 HP
The Stock Version Output Is Like 130 hp (96 kW)
&
The Intercooler equipped version of the engine increases the output of the engine To 145 hp (108 kW)
& what i Know is that
The top mount intercooler kit is for the purpose of providing greater cooling capacities.
The kit incorporates a vehicle specific heat exchanger that allows the reduction of both
inlet temperatures & engine running temperatures, resulting in increased performance,
reliability & consistency and sustainable power.
By intercooler kit can boost engine power by a whopping 10-18% over standard engine power.
Edit: Added Info