A set of rear EPS poly upgraded rear track arms off my 2002 'S', OEM p/n is 986.331.043.07 ( or TRW 986.331.143.04 like these). These are the EPS versions with very stiff poly bushings that won't wear out like stock. Less than 2000 miles on them, perfect mechanical condition.
New are $350+ for a set (these or stock TRW's).
$200 + shipping (nominal as they are light).
) as an experiment when I was occasionally autocrossing last year. Results: I can't tell a difference, so now I have spare set. A couple here have suggested you increase spring stiffness or compliance, but again I can't tell any difference on street or AX. The poly is quite hard.
Linear Mode
