Everyone thinks that pod filters give better power.. well they do make a different noise that's about it.
If you want to get instant more power without spending a cent. simply lighten up the car. the lighter the car the more power to weight you have. take out anything you don't need.. spare tyre, rear seats, what ever.
You're better to spend the money elsewhere than pod filters like on a decent mod e.g. semi slick street tyres they are the first thing I would suggest you do to any car.. better acceleration, better braking and much faster cornering. they only cost about US$120-150 each and will crap over a gay air filter. The ignis already has light weight rims so no need to change those. if you want some other good mods then go for an exhaust. Here is one half the weight of the original.
Fujitsubo - Legalis R - Nengun Performance
cheap but helpful part if you drive your car really hard.
Suzuki Sport - Sports Thermostat - Nengun Performance
upgrade the clutch too:
Exedy - Single Sports - Sports - Nengun Performance
The clutch or the tyres or exhaust or lightening up the car will be much better bang for buck than an any air filter.