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OEM Cost Saving on Spark Plugs
Posted to the Waveform Library on 8/14/2020

These are spark plugs from 2016 Ford 6.2L engine (V8 with 16 plugs). You'll note a yellow dot top and a white dot top. Also, you'll note two different part numbers CYFS 12F and CYFS 12NPG. Although these were installed in the same engine on the assembly lin...