Hi mate,
i asked myself the same question when i had my 1.4. after i did some digging i found out that the best way was to use the intake system from a laguna.
ditch the standard airbox fit this and u will be laffing!!
You loose the air filter housing from the laguna setup and what i did was extend the part that fits onto the throttle body. also you can use the larger throttle body off the 1.8spi laguna for a little more power.
as you can see in the pic the black part is from the laguna, then i extended it using some aluminium pipe and then a cone filter on the end of that amd fixed it between the radiator and headlight were that gap is so u get planty of air to it. u dnt need the lagune throttle body, as the intake system off the laguna bolts onto the original throttle body you hav on the engine now, thats just if u want a little more power.
gimme a shout if want any help!