If everything is free then ok, but it's a waste because anything below a GTI 16v (that includes 8v) won't really benefit from mods such as CDA intake. It'll gain maybe 1 or 2 hp and at £200 for a CDA kit that's £100 for horsepower...
I'm not familiar with non GTI engines, so I can't tell you what the tubes are, but if they're small tubes only a few mm in diameter then they're vacuum hoses.