I normally buy another, much cheaper brand. However, that brand has it's name on one of the plugs. I was attracted by the lack of markings on these plugs and paid the steep price. Wrong. They had the brand on them as well AND they seemed to be of the same quality. I returned them.
Take the old plugs out, put the new plugs in...simple as that for some instant bling. Fit and finish seem to be very nice and anodizing did not show tool marks after being installed like some of the cheaper ones do.
Machine this part was bought for: 2009 HONDA CRF450