if youve got the money gruppe m set up
problem with the short arm is it keeps it in the engine bay with all the nice hot air, which isnt very good as it has less oxygen and on a 1.6 you may find that it feels like it doesnt gain anything.
look towards the CAI kits that sit down in the wing away from the engine.
or a cheaper option is remove your airbox and inspect the inside of it. if theres any ribs in the box remove them with a dremmal to make the box smooth as possible, drill out a large hole 2-4" if possible and add a pipe form the wing or front bumper to supply more cold air. and fit a panel filter.
i have done something similer on the bora (however i used a bigger intake pipe off another model ) and see similer airflow gains as induction kits add