I purchased a six pack of NGK BPMR7A from Amazon. I run them in all two strokes I come across unless the engine uses a CMR6H. These plugs have the stamping on the base like legit ngks do. These plugs will not run in five different engines. I've never had an issue with plugs from Amazon. These are the best looking fake plugs I've seen. Not really a question but just a heads up that China has stepped up their game.