- Sep 23, 2005
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i hear from a friend that there are spark plugs that make an N/A 4.6 gain about 8hp , is that true?
if so , which ones , because i will change mine soon. any other plugs i can gain some power from , and how?
thank you
if so , which ones , because i will change mine soon. any other plugs i can gain some power from , and how?
thank you