Just sold my evo x. That car been with me for almost 4 years. So sad..
Last moment of my car:
http://forums.evolutionm.net/members/hoongss-albums-evo-x-gsr-picture26519-lastmomentofevo.jpg
Water injection decreases the possibility of detonation by lowering the combustion chamber temperatures and increasing the effective "octane" of the fuel. This allows the engine to run a higher boost and full spark...
The noise that I don't like especially driving on the road eg Federal Highway towards Subang. I also noticed those Plus highway with cement will generate a lot of noise.