NGK spark plugs have been around for a long time, they are an original fitment brand you can trust. These not a lot to say about plugs unless you want boring copy and paste technical details, a new one will work that's the main thing. If you are having engine issues always start with the easier (and usually cheapest) fix it solution which will be a new plug. The Spark plug DPR9EA-9has the 12mm thread and 18mm hex drive.
If you hate been bombarded with unless crappy emails you should join our email list. Our marketing department is so overpaid and under worked you properly wont get any anything, but just in case you should join.