Basically mate the air flow pipe pulls away from the air box, just leaving the air filter housing box attached with four nuts, just use a spanner to remove these and it should come off in your hand, the air filter itself will just come loose. Your left then basically with the rectangular area that the housing box was once attached to. If your induction kit doenst fit direclty onto this, then you'll need an adaptor plate, sometimes the potch is more hassle than its worth...
Your better off looking for a Piperx kit for sale on here, theres normally a few ones that pop up now and again. I'll try and find a pic now that can show you what this looks like when fitted.....