I pulled the headers out of the box today and started bolting up the collectors. One of the bolt holes are to close to the tube and the heads of the ARP bolts hit them. I called S&P and I asked them if I could open the hole up 1/8" towards the outside of the flange and they said ok. WhenI got through opening up the hole and making the bolt fit, I noticed the #3 and #5 tubes are touching each other. I tried to check clearance with a piece of paper LOL and couldn't get it to slide through. I got a hold of S&P header dept right as they were closing and they said they would talk with me in the morning about the problem and I said OK, I'll send you some pics. Hell with it, I'm pretty anal when it comes to perfection and decided to ship them back in the morning even if they could work. I want the tubes evenly spaced to where I can get to the spark plugs easy. Just when you think things are going well all hell breaks loose!! I do have to say the chromex coating does look nice. I've even heard that Mark Campbell the owner has taken very good care of his customers that have had problems with their headers. I do see some quality control issues that I would change if it were my design. I would add 3/8" stainless flanges and make sure the header flange ports were round instead of leaving weld metal in them. I've had a few problems with S&P but I'm willing to give them a fair chance at taking care of me before slamming them. They have a very professional work team when talking with them over the phone. I'll keep you posted.