Maybe BBK's welds aren't the best, but me and several of my friends run them with no issues at all. My one buddy has had his for over 5 years (and the first year it saw snow and salt) and has had no problems to this day either.

 

Not saying they are gonna fail but they should be ground out on the inside to open up flow because i heard that they protrude into the port. thats why i was saying their welds are junk.