I have aa set and waiting to install. I had to spend some time to make them.... better.
Firts of all - I re - welded them outide the pipe to flange
Then porting pipes
Flange to head surface was milled,
Finally they were ceramic painted to black
I have some pictures I can share. Out of box impresion on this product for me ...dissapointing but there were no other choice that time so decided to upgrade it.
I will post some picture.
A question:
What gasket will be the best if my flange is now flat. I got gaskets in the box but for me quality of them is doubtful.
Also go screws in a kit. But I will prefer to use threde studs - what is a better for aftermerket headers in your opinion.
Instalation is a bit complicado and refiting them after finding a leak...will be a drama job.
PS (sorry for my english - still learning and still make spelling)
Your English is fine, better than my Polish for sure!
I agree that the quality isn't the greatest, but for the price I was satisfied.
I'll let someone else speak to your gasket question, I used what they sent. In my opinion studs are best, then allen head bolts, then regular bolts in that order.