Iridium spark plugs
#4
they're available at autozone. they wont come up if you put the S4 in. i use these:
Audi B5 S4 2.7T > Engine > Ignition > Spark Plugs > ES#2219721 Spark Plug - Set Of Six (#BKR7E) - BKR7E
Audi B5 S4 2.7T > Engine > Ignition > Spark Plugs > ES#2219721 Spark Plug - Set Of Six (#BKR7E) - BKR7E
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