Correct plug for stock 454 Mag MPI?
#1
Correct plug for stock 454 Mag MPI?
Anyone have the correct part number for the stock spark plugs for a late 90's era 454 Mag MPI? Do the heads on these engines have the heart shaped fast burn chambers like the Vortec heads have, or are they the standard 119 cc chamber such as was used on the carbed 454 and 502 Mag?
Thanks!
Thanks!
#4
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I suggest Champion RV15YC4 spark plugs for an upgrade to the 454 Mag.
They are an extended tip plug and will increase performance and fuel economy. They are designed to be gapped at .045 inches and will increase spark plug voltage output.
Available at any auto parts counter for $1.99 each (or less).
The 7.4L (1996 and newer) will use a different plug than the 454 Mag.
They are an extended tip plug and will increase performance and fuel economy. They are designed to be gapped at .045 inches and will increase spark plug voltage output.
Available at any auto parts counter for $1.99 each (or less).
The 7.4L (1996 and newer) will use a different plug than the 454 Mag.
#6
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Join Date: Mar 2004
Location: Denver, NC
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I see/read a LOT of recommendations for NKG BR6FS or even the AC Delco Rapid Fire Platinum #1 for both the 454 and 502 mpi's. I use the AC Delco Rapid Fire Platinum #1 plugs.
#7
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Join Date: Apr 2009
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I am running AC Rapid Fire #1's and I am happy with them. They dont seem to foul out as easy at idle. They are a little more expensive but I only change them once or maybe twice a year. I used to run AC R43TS's and they worked good too. Good luck.
#8
I run Autolite somethingorothers. They are $0.99 each, solid copper core.
#9
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Yikes!!! I just changed mine for the first time after about 7 years...and they still looked and performed great. Only reason that I changed them was that I was replacing the plug wires.