Quality EMPI product. Set of four spark plug inserts. Requires an M16 x 1.5 thread insert tool to fit. A quick solution to stripped spark plug threads.
Simply cut a new thread and re insert the spark plug with the insert attached and a little thread lock on the outer thread. Leave for a little while before starting the engine and your spark plugs will never fire out again.
Empi spark plug insert (set of 4). Fits all VW aircooled engines.