This is the seal that fits against the back of the rear window and buffers the engine lid keeping water out of the compartment. the original part has a steel spring embedded in it for attachment to the ledge and the repro glues on with some weatherstrip adhesive.
A necessity when replacing valves / springs or working on the cylinder head. Sold individually.
This item may need to be sourced from Germany and would take 2-4 weeks to arrive. Once ordered it cannot be canceled. Please call to check stock or request expedited shipping.