I had the K03 Neuspeed turbo discharge adapter on my k03 gti and thought is was a worthwhile upgrade. I now have an ed30 and wanted to buy the k04 version of the Neuspeed turbo discharge adapter, but at £270 I thought it was a bit steep considering I already had one for a k03.
I thought right, let’s see what the difference is so I whipped of the adapter and at first glance I thought no chance of that fitting.
After measuring up I realised it would fit with a bit of simple machining. I gave my dimensions and the adapter to an engineering company, got it back and installed it... It fits!
Original
The turbo side is machined back to 35mm then the hole on the turbo side is bored out to 44mm
Modded
Fitted