I'm a n00b to the forums, but sold parts for about 6 years. I keep reading posts about plugs and which ones to use. I just wanted to let everyone know that Autolite makes Motorcraft plugs and ergo, they are one in the same. They are stamped differently but created identically in every other way. I hope this saves you some $$$ at the parts store where the kid behind the counter tries to sell you the Bosch +4's since it's the highest price he can find. Research: http://www.autolite.com/products/index.html.