Quote:
Originally Posted by M3n2c3
It's not necessarily the bolt pattern at the top of the mount that's an issue (although that could be another problem altogether). The difference I'm discussing is in the way the springs taper at the top (meaning they fit up to the mount differently), and the way the struts bolt to the mount. For example, 02/03 struts will not bolt correctly to 04/05 mounts - there is a difference in size at the top of the strut that - while it may allow you to attach the strut - will cause the fitment to be loose, clunky, and eventually wear the topmount out oddly.
See the little shoulder just under the threaded portion. That's the problem. I don't know if GC/GM struts will have the same issue, but I'd say chances are good.
Again, I really think the point is moot anyway, as GD springs are intended for a different chassis that's 500lbs heavier. There's an insignificant amount of money to be saved when compared to the potential problems.
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Sounds like the problem isn't with the topmounts, but with trying to use stock struts. i.e. coilovers for an '04 STI could work on a GC... as long as the topmounts fit the bolt pattern, and the lowers match the knuckles, you *can* install 'em on a GC as well. Whether or not that application is ideal is certainly up for discussion.