I have a 08 6.4 that I put a single turbo on. The kit I used was by Maryland performance diesel, and I choose the s467.7 because they told me it be best for my truck running stock fuel, it was biggest I could go. Well I put it on and ran the truck for less than 3000 miles and my turbo seals went bad, I had sent it back and they took about 3 months to get it back to me and could never return a call. I finally get it back and they told me it was all rebuilt and good to go so I put it to back on and drive the truck for two weeks and put 800 miles on the turbo and it bows again.it has now been another month that they have had it and can't tell me anything as usual and say they will call back always and never do. So I keep calling them and it was supposed to be here this week but yet again that was another lie. One I would say I am very disappointed in there customer service! And I also have gone through everything with them and it's not my truck that is killing this turbo, it's the turbo itself that's bad and I'm supposed to get a new one but haven't seen anything, this sucks haven't been able to use my truck all year. Has anyone else had this experience with Maryland or a s467.7 fmw turbo from them, it's a borgwarner turbo.