The Mk2 Jazz already has a cold air intake for the engine, there is a duct that runs from the front of the bonnet to the right rear corner of the engine compartment, as you face the engine.
A couple of inches away from that duct is the trumpet intake for the air intake duct to the engine.
It would be difficult to join the two together as you have to allow for engine movement on its mountings. This would apply to any cold air intake that drew air from outside the engine compartment.
I doubt that a cold air intake would make any perceptible difference anyway.
A K&N filter makes a small difference but only if you are prepared to use the revs that the I-vtec engine is capable of.
Vic.