[speeder]

What I have heard is that splitfire is not even a manufacturer, just a marketing company that has any one of several lowest bidders actually make these great plugs. Bosch and NGK aren't in the running here. Think Slick50, K&N, cool-collar, etc. When it comes to something as crucial and inexpensive as spark plugs, I do not mess around. I want the best, more specifically I want the ones that are recomended for my car, I have had nothing but good luck with this formula. For my 911 that would be the correct Bosch plug, although many people have had great luck with NGKs on 911's for years.

BTW, if any of splitfire's,(or slick50's etc.), claims were true, every race car on earth would be running them. These are people who will spend $ for .10 of seconds faster. And they're not.