I'm using bluebird wastegate parts so some of that in the above may be useful with different brackets. I soaked that snap ring in a puddle of PB blaster for like a week (off the car). Then tapped it with a screwdriver and hammer to break it loose and spin it in place. Then installed one the car (wastegate disconnected) tapped it with a rubber mallet until it spun around where I wanted it. If it doesn't spin freely it might be better to do it off the car ie less stress on manifold and studs n'stuff