what spark plugs on 454mpi 2000 385hp?
04-09-2003 | 05:52 PM
#2
Charter Member #1171
Joined: Feb 2001
Posts: 4,018
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From: Clearwater, FL
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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04-10-2003 | 06:48 AM
#4
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Joined: Jun 2002
Posts: 910
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From: Central Ohio
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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