Not really but... it will because you will probably be booting it everywhere to hear the induction noise/turbo/diverter valve etc!
I'd have said yes. As it'd taking in more air so needs more fuel to compensate. But I don't know anything bout nothing. 
) but when I had mine on my old car, I hoofed it everywhere to hear the noise and got shocking petrol bills 
2 Many Ibiza's
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As said above. if you drive it the same as before you will get the same consumption but you wont be able to hear the induction roar. But to hear that induction roar you need most of the throttle; and thats where your normal fuel consumption goes down the pan!
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