S5 Performance & Mods
I walnut shelled my 2008 S5 with 40k miles on it, and in 10k miles I'm again getting random misfires cylinders 3, 6, and 8. I plan to swap the coil packs and maybe look at the spark plugs. They're the right heat range and size but they are the cheapest NGK R's I could find at a hair over a...