Thanks guys for the PN. But if anyone's had trouble with NGK's, I've heard that there's a difference between US-made and Japan-Made ones. When I used to ride bikes (I'm a UJM fan), my friends swore on the Japanese NGK's.... But UJM's are cheap, and my SL is no toy to screw with, so I just might stick with Bosch unless I hear any testimonials for Japanese NGK....