The tfsi intake systems need the engine cover removed. uid engine cover can be modified and refitted afterwards
There are a few members on here who can mod engine covers if your not handy with a dremel or spanners (I dont have tools or dremel), I am going to see if someone will mod my engine cover for me, I just bought a spare from Ebay the other day (should arrive today or tomorrow) so that will get modded to allow for Intake system.
Your right not everyone can afford The VWR/ITG or Twintake, or perhaps not so much as can't afford it, but would rather be different or spend money on other things (Or perhaps dont like the look of a tube with filter on the end, or as I like to call it "Blue Peter toilet roll with Grannies Clunge Sponge stuck on the end", Evom's, Dbilas, A.W.E. and Volant are all other options altho I think the Dbilas and Volant are the cheaper ones from those.
A.W.E. and Volant are also closed airbox designs so likely a little quieter too.
You pay your money you make your choice!