They look to be just a generic replacement for the banshee coil, but ive never tried one of dear ole Dans. My advice would be to cast the net a bit wider and check out banhsee upgrades or for something you can buy from a sensible person locally, what about norbo?
He's in Peterborough right? But the ad states that this item is shipped from Newark??
I've never bought anything from him despite seeing a few things I've fancied over the years. I wish that he had a shop/unit to view/collect goods from, I certainly would have visited by now. Yes, I'm old fashioned when it comes to shopping I know.
Id love to see a dyno test with an OEM, these and the Dynatek when new and also after say 3000 or 5000 miles to see how the cheapies and the posh unit degrade over time or not. Also interested to see how much an OEM degrades as well. Ive got a bunch of old OEMs here, it'd be nice to know which were the better ones of those as well when hot etc.