N55 Spark plugs and maintenance
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01-09-2013, 09:32 PM
EX One Addict
Drives: 2011 Audi S4, 2008 Vette 6mt
Join Date: Aug 2010
Location: Lone Star State
I changed mine at 23k miles, was having a misfire after installing Cobb S1 Aggressive.
I had run Dinnan S2 for about 12k miles before i went to Cobb.
Misfire is now gone!
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