what spark plugs on 454mpi 2000 385hp?
#2
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I vote for A/C Rapidfire #1's,,,,,,, believe yours calls for 43's though,,, 44's might clean up the transom a bit,, dont think I would run 46's
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#4
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May want to try AC-Delco rapid fire #1's. A lot of people have had good results with these plugs, including eliminating a lot of the black smoot on the transom. I'm going to use these this year. Just bought a set last week on my 502 MPI.
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speed demon
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06-29-2005 11:27 AM