I have a set of these headers.
I got them around June-July of 2012 and installed them WITH NO PROBLEMS!!!!
I did it all in my garage, no lift. I reused the factory bolts by Nick's suggestion and I've had no problem.
I also have the RJC DP which fitted perfect with these headers.
I have about 1,500-2,000 miles on them so far. I drove the car to BG this year, raced and drove back without any problems at all. These headers are AWESOME!!