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Swapped out my old plugs. This is after an entire season of caressing my car down the track ( I never beat on my car.) Plus a couple months sorting my FF960 CA91 tune. Sorry for the crappy pic, just threw them in the box since they looked ok.
I think this was my own fault. Either some kind of grease incompatibility, or I just wasn't liberal enough with it. Always use enough lube, if there is ever any doubt about compatibility, remove every trace of old lube. That's what she said.
I am car 31. Car 83 is a supercharged Z06 that must have been spinning the **** out of his tires. My car hooked, the week after a huge drag racing event is always the stickiest.
In other news, about 43k on this MKTurbo exhaust now.