Actually, I prefer the standard air filter with its very large surface area, which allows air to flow straight through. I'm not a big fan of strong currents, but the turbulence within this "hood" might be quite significant.
Conclusion: Yes for better sound, no for better performance. You can achieve a similar result to what Ulf described by simply attaching the stock air filter box to the rear wall. "Kilingt" also translates to "sounds good" in English.
Best regards, Georg.
Golf VI Variant (2012) 140 tkm, CFHC Schummeldiesel