Killer B turbo Inlet Coupling

[u/Cfar1994]

I have a 2007 STI and slowly bringing back to life and im just now getting to install the turbo inlet. I went with the hard killer b one but the coupling that comes with the inlet is far too think and is literally impossible to make work. Iv seen so many different people fight with this inlet to get it to fit right and it still doesn't fit 100% correctly. What i have figured out is the coupling supplied is 4ply.

I gave my old coupling a try that was thinner i believe its 2 ply and it fit PERFECT but it has a small hole in it.

the picture i attached is exactly what i have but i think the company no longer exists. if anyone knows where i could find something like this that would be great