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what spark plugs on 454mpi 2000 385hp?

Old 04-09-2003, 04:44 PM
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Default what spark plugs on 454mpi 2000 385hp?

what spark plugs should i use on this engine?
like #44 or #46 ?!?
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Old 04-09-2003, 05:52 PM
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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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Old 04-09-2003, 07:39 PM
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AC Delco MR43T / R43T (stock)
AC Delco MR43TS / R43TS (better; extended nose)
NGK BR6FS (std nose)
NGK BPR6FS (extended nose; hard to find)
Champion RV15YC4 (extra length extended nose)
 
Old 04-10-2003, 06:48 AM
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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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