exhaust pipe manufacturer seem to be a singularly cantankerous lot in my experience.
Only time I tried to use phukked I went with a pocket full of cash to sort a one off pipe for a pre war bike.
10 mins of their attitude and I was back out the yard. Amazed they are still in business.

I have just looked at their reviews on Trustpilot, appears when ever its wrong its your fault, masters of sarcasm too.