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      04-11-2017, 10:37 PM   #28
Zel335
First Lieutenant
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Drives: 2012 335I Sport
Join Date: Jul 2015
Location: Opelika, AL

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Quote:
Originally Posted by shivaswrath View Post
I thought answer was S55.


We need a tuner or expert to weigh in. Even shops here don't know. I blew 4 plugs and coil packs due to poor gapping on stock plugs and High boost, so def don't experiment with this crap.
I wasn't sure if the S55 was the one step colder, however that does seem to be correct. Another person posted that it is indeed the 97506, spendy bastards, guess I'll try to get them off ebay and save $4 per plug.
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