Originally posted by N2EAL:
XP104 Plugs work great.



Interesting... Keep us updated on how they last. They should be good for more power (if only slightly) in some applications, and if they last as long as the double-plats, that's a win-win.

-Philip Maynard '95 Contour [71 STS | Track Whore] '97 Miata [71 ES | Boulevard Pimp] 2006 autocross results