Look into getting a boost valve if you're desperate to get one or get a cold air intake, its possible to get a cold air intake but the problem is especially with the K you get a loss of power drastically. Not worth it in my opinion its annoying after a while invest in an ulcer sport backbox if you want sound.
Replacing the airbox with a cone filter will give you a nice sound, with an almost blow off type noise due to the recirculation valve, but as mentioned it makes the car a lot more lazy and has a drop in power. Adding a dump valve to a car with a air flow sensor is bad in general as the ECU does not realise that air has been dumped so calculates the fuel for that air still being in the system.
I did both on my previous Vauxhall which was a 1.4t Meriva