Harder bushings for the lining of the carrier arms on various VAG models with MQB platform including the VW Golf 7 ,Audi A3 8V, Seat Leon 5F etc.
The original bushings have almost no possibility of being adjusted in static camber, caster or roll-center which, according to Racingline's experience, can be critical on the A5 platform if you want a more precise steering.
