I already took out the standard air-box and replace it with a new intake ram. Picture below =D
Picture above shows the new intake setup for my engine. From butt dyno, all i can say that the torque at high rpm is much more better but something that i need to take care of is this setup is not suitable for daily driving since it might suck the unwanted things such as stone and so forth. As a precaution i already put some netting in my cold air intake to prevent stones from sucked into the intake.
p/s: for race use only.. lolx