The Z has a plastic oil pan protected only by a plastic rock guard. Just after Z Nationals I ordered a Z1 aluminum undershroud for the Z. Installation was pretty straightforward and the instructions provided by Z1 were spot-on. The hardest part of the installation was installing the rivnuts. I also used some foam weatherstrip to simulate the seal around the vent on the OE rock guard.
The quality of the undershround is great and the service panel makes it really easy to perform future oil changes.
