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NJK 2 plugs are the best in my opinion.Bosch 4 platnums is just overkill according to some people I have talked to. it's not needed and aren't as good as 2 because the spark is having to pick between 4 instead of 2.
 

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i just put in Bosch Platinum +4 plugs in my 328 and its great so far. I dont see a problem with these spark plugs. :bigpimp:
 
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