So I replaced the stock sway bar in my Forester STI with a 22mm Whiteline one...
After that I heard a loud clunking when I was taking a sharp corner. After some GoPro investigation...
I found that the sway bar was sliding laterally.
I made some collars to fit to the bar inside of the mounts, which seems to have largely stopped the sliding.
But now I am getting a loud banging noise when I turn into driveways when the left wheel wants to be dangling in the air (possibly only when turning left into driveways).
I jacked the car up and when the suspension is fully drooping, the end links look like this:
And when I compress the RHS with a jack, the RHS end link looks like this... (looks a bit bent too)
The other theory I have is that the sway bar might be hitting the fuel filler pipe.
The banging seems to come from both sides of the car.
Help!