Removed from my r53 not pretty but do the job

Roll centre adjusters (R50, R52, R53 only)

Roll centre adjusters are installed to correct suspension geometry after a car has been lowered. The uneven length of suspension arms causes Toe adjustments to occur drastically during braking suspension “squat”, these Roll centre adjusters make up for the travel in the suspension arms to return suspension geometry to it’s correct starting point. This allows alignment and steering to remain more consistent and predictable during aggressive driving and competition.