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      12-26-2012, 08:38 PM   #2
Ricke90
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Drives: 330i
Join Date: Oct 2012
Location: Lotsa places

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I replaced mine around 75,XXX miles. Started to have a random miss and just decided to replace the coils and plugs all at once.

With proper functioning ignition hardware, there is an extremely small performance benefit from "performance" coils and plugs. Basically, a spark is a spark. Your alternator delivers X amount of electricity to the coil, performance coils won't receive any more power than oem.