Hi, RicK
Its the frame itself, mind you the rubber mounts will get changed as well, I did the lower rubber mounts last month at huge expense for a simple part.
The frame only has 168 hours remaining, mind you that could be two or three years flying for me...
I see Texas Heli make a PMA part, but I'm not sure if I can use a PMA part here in the UK, having said that the fan belts are PMA and put on by the maintenance company...
Cheers
Kevin.