The OEM Champion plugs are the way to go. There is no performance gain or increase in life by going to anything else.
Pedator, CAI, MDS indicator, ESP/BAS defeat switch, Tranzformer, blacked out wire mesh grille, smoked and flashing side markers, 9005 2400k 65W fogs, Euro rear fogs, debadged and demolded, 255/45/20 Nitto 420's, Boss 338 wheels, painted calipers. Glovebox & cup holder LED Mod. Blastin Bob 6db reso delete pipes. Euro LED side signal repeaters, 55/35 window tint, BT catch can. Color matched tail lights. Custom front lip. LED interior lighting.
Next: Lower with BCR Coilovers.
Really hmm??? I've never used champion plugs I've used NGK's and I can't recall any problems of any sort but I know cars have they're likes and dislikes and this is my first 300C so I'm getting used to it
I have the NGK iridium plugs installed now ( good deal) but when I pulled the Champions at 30K to install them they were in great shape. A lot of people maintain that you should stay with the Champions because of the MDS system. I've put 30K on the NGK's and I'm getting an occasional cold weather miss at start up.
To each his own but next set will be champions simply because of cost/benefit.
And yes, in the past 45 years of working on cars, I have experienced failed plugs from Champion but it's rare.
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