08-10-2013, 04:02 PM
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#13 (permalink)
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A True Z Fanatic
Join Date: Oct 2012
Location: Washington
Posts: 1,252
Drives: 09' 370z 7AT
Rep Power: 16
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Opinions on NGK R2558A-9? It's listed in the Nismo catalog as a race spark plug.
http://www.nismo.co.jp/en/products/c...f/engine02.pdf
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