Is it possible to remove the factory P5 air box and air dam (in front of radiator) and just attach a cone filter? If so, will it do any damage or will it add any power/throttle response? I don't care if it looks good, I just want a little better performance and a little growl under the hood. Do I really need a SRI if I just remove the air box and attach a cone filter? Will it give me the same results?