[Perfectlap]

There have been three IMS failures on this message board since I joined a few years back. That's troubling because we have a small membership here.

I waited for my clutch to kick the bucket before upgrading the IMS but if I had to do it again I wouldn't have waited that long. Better to replace the clutch and IMS in one shot and take a loss on the prematurely replaced old clutch. In the end you still get a new clutch to put down the power and have removed a great deal of the uncertainty. If your car has more than 60K miles I think holding onto a clutch in its last 30% of life and thus postponing the IMS upgrade is not worth the gamble. For an experienced Porsche mechanic, this is not a complicated job.