A buddy of mine just had his 1st gen oringed by Zack at Hamilton Diesel. He wasnt that impressed with the job. He just didnt like the way the oring looked.bad_cummins said:Well I know that hamilton diesel out of Liberty Hill will do port, polish, and O-rings but i have never used them for a job. I'm not sure if they will do a firering job but O-rings with studs will hold a lot of boost. I have their telephone number if you would like to try it just PM me for details.