The Audi TT/TTS/TTRS LCA with the solid rear rubber bushing is proving to be a very desirable upgrade providing improvements to caster and adjustable negative camber.
This package includes all the parts you need to fit these arms to your car.
2x ball joints
New LCA bolts
New ball joint bolts - upper and lower
It will widen the track slightly as the camber adjustment is done on the ball joint.
Depending on your alignment you may also need tie rod extenders. There are different options out there for this. I've did not need these running slight toe out with the sliders on the minimum setting. Your results may differ.