As per link its in german i think but half way down there is a link to a intake mod that uses the Golf Hybrid I got the part off Ebay for $25.
Neuer RS - jetzt SupAIRb - von Hansen - Seite 26 - [5E] - Showroom - OCTAVIA-RS.COM
Yeah Resonator supplied by exhaust shop and fitted. Alot of people use a 18" Vibrant S/S exhaust.
I haven't got my OBD eleven yet but Items I plan to enable are:
High Beam Assist, Fan speed indicator, Recirc memory, Mirrorlink & Vehicle in motion, Traffic Sign detection, Boot alarm off, heated seat memory, Soundaktor off or lower %