Originally Posted by Hamfisted
Delmarco wasn't using Urethane shock mounts, they were just the stock mounts. His bump stops were destroyed and the shock tower metal was just torn loose. His stock mounts were way over due.
Exactly my point. stock mounts, made of rubber, absorb more of the impact than urathane would, and his shock towers still bit the dust. The reason his towers failed is because the rubber failed and probably his bump stops too - this made the impact on the towers much stronger [clunking] and thusly tore the metal. Think about it, What if the shock mount just involved bolting the top of the shock to the tower instead of having a rubber damper in-between the shock and the shock tower? It'd be much more harsh and transfer much more of the impact transients to the metal shock towers. Metal may flex from a dampened force, yet would break\tear from that same impact without any damping.
As I said, get new bump stops and E46 convertable mounts and a re-enforcement plate on the top of the tower where the nuts bolt onto the mount's bolts, and you should be gravey for quite a long time - ontop of that, you'll probably save a considerable amount of cash too.
If you'll take another picture of the shock mount with the bump stop slid down, we can tell you if your current mounts are bad. It can't hurt to replace them anyways but odds are they may be just fine. You do, however, NEED to replace that bump stop. As Mike and I said, this further helps prevent shock tower damage and quick degredation of the mout itself. They are very cheap and you don't even have to compress springs\etc. Just get that side of the car in the air and unbolt a few things and slide the new on on. Cake.
Unless you want to really track & race your car should you worry about preformance (urathane) shock mounts. Besides, if you are investing in preformance shock mounts, you WONT notice the difference unless the rest of your suspension is decked out... And no, not just a fresh set of lowering springs\coilovers, I'm talking about full on stiff stuff - bushing\bearing replacements such as RTA Bearings and LCA eyeballs.