UGH. I wrote a nice long post about these and a good review but I was timed out while I wrote it and it was lost. grrr stupid forum
I have to get offline soon so here is the bottom line
The quality is amazing, no need to buy the expensive DC or Megan headers, the fitment was perfect. Also since its just my DD I dropped them and smacked them with a hammer and they held fine.
Also the welds are great, no hanging metal inside, collector welds are even.
No performance gain since they were replacing a custom header broken in an accident though by looking I can tell you it will improve flow if you were modded.
I will rewrite my post later.
Take care