its a 1.4 corsa sport, its going to get 2 big pipes from the wheel arch taking in cold air, i no engines run best on cold air, but when the engine is cold and they breathing cold air they use lots more juice. they definatly wont run richer because more = a weaker mix of petrol, suppose the only thing i can do is put the air box on and see if theres any difference personnaly on me old sri, the origianl deristricted air box made it go lots better than an induction kit