Below is the tool I used to install the rear main seal (RMS) on my Porsche Boxster. It's a good idea to replace this seal anytime you replace the clutch or IMS bearing. The seal was a common source for oil leaks and has been updated several times by Porsche to address the problem. DO NOT attempt to hammer in the seal. Since it is large and thin, it is extremely easy to get the seal in crooked. Instead, create a tool that presses the RMS in using the flywheel bolts.