Only thing is, I had to remove the box silencer and since the exhaust is 11 years old, the tube broke and had to get it fixed
My father told me that he had taken the car to the local Citroen dealership a few years ago for the same job. And "what a surprise", all the bolts were tighter than specs (BOL says 52 and 55 lbs), the lower bolt was torqued to more than 100 lbs! I know because my torque wrench doesn't go more than 100. So I had to use my left leg to push on the ratchet handle.
But everything is in order.