THIS KIT ALLOWS A DOOR UPGRADE, MIDRANGE AND TWEETER UPGRADE IN THE MK3 TT WITH FACTORY B&O SYSTEM. NO SPEAKER COLLARS ARE REQUIRED FOR THE MAIN BASS SPEAKERS, THE MIDRANGE ADAPTOR WE INCLUDE IS 5MM THICK SOLID PLASTIC AND WE CAN ADJUST THE HOLE SIZE TO SUIT BEFORE WE SHIP, THE TWEETER HOLDERS CAN ALSO BE ADJUSTED TO SUIT YOUR TWEETERS, PLUG AND PLAY CONNECTORS FOR THE DOOR, MIDRANGE AND TWEETERS ARE INCLUDED
