<E30> Rear Subframe Mounts

[Ryan Straughan <rstraugh@xxxxxxxxxxxxxxxxxx>]

My '89 325is's rubber subframe mounts seem to be wearing out.  I suspect
that this is due to the fact that I have Eibach Pro-Comp M3 springs and
25/22mm swaybars (and of course autocrossing, hard driving, & nearly
130k mi on the car).  

My question is: 
   If I replace them with the $40 stock mounts will they last for a couple
years of autocrossing or should I spend the $250 for the hard rubber
subframe mounts that Korman Autoworks sells?  My goal is not, to stiffen
the chassis, but to alleviate the clunking I hear when cornering hard on
rough surfaces and when I hit larger bumps in the road.  Not to mention
keep the cost down and prevent any damage to the car.
   Has anyone else, with similar modifications (Eibach Pro-Comp springs,
Bilstein HD shocks ,25/22mm swaybars), had a similar problem?

Thanks,

Ryan Straughan
'89 325is

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