got a 1.6 mk 1 myself mate.

with the filter bought a k+n panel and bought a k+n air feed which i fitted from the base of the air box without resonator and fed to the lower grill although i had to reposition the horn slightly. i found this gave the best air feed. i also fitted bosch super 4 plugs and took it to collins performance for a powerchip. this made a slight difference with the LUK clutch i had fitted. the chassis makes up for the lack of performance and the lack of power. therefore i fitted EBC discs and pads with silicone fluid so you can slam the anchors a bit later lol