Spark plugs 502 MAG MPI
#1
AT Cult Member #3
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Spark plugs 502 MAG MPI
What type of spark plugs do you use in your 502 MPI? I am replacing the AC Delco Rapidfire#1 that have been in my boat for 150 hours OE plugs were NGK. They don't look to bad for being in there for that amount of time...
#2
Charter Member #1171
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Re: Spark plugs 502 MAG MPI
I always ran the Rapid Fire,, had good luck with them.
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#4
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Re: Spark plugs 502 MAG MPI
Try the AC MR43TS - extended tip, same priciple at the rapid fire with half the price. I use them in all of my boat motors. Supercharged 454 and twin 502s.