Need to replace my plugs. Im only gonna be running about 300bhp. Seen some HKS ones, 70 pounds for a set. Surely i haven't got to spend that sort of money, have i. There are some NGK plugs on fleebay for 35 pounds, this sounds much better value. I suppose you get what you pay for though, basically im asking if i need expensive ones or cheap ones. Thanks. Matt.