I have a super B turbo for an 03-04 cummins. I have 2,000 miles on it and 2 pulls. Each pull was put on at 1000 miles and the other one at just about 2,000. I bought it new and was broken in for the first 200 miles not going over 1,800 rpms. then gradually went higher. Always cooled down. never went over 1,400 egts with it. I want a 66. Will consider trade and money or something else for an 03. pics soon.