For spark, I wasn't sure I had the right plugs so I went with the OEM Champion plugs that were recommended in the Bentley. I checked for spark, no issues there.
Yup, these are great. Just be sure you gap them to APR's recommended gap of 0.024" ±0.002" or 0.6mm ±0.05mm. If you want 1 step colder plugs, not needed on your setup, but if you do for the future in Stage 2+. For 10$ more than the OEM NGK you can get the BERU.
I have the beru side firing and they work just fine.
Replace those plugs with nothing other than the Champion 7989 plugs. They are about $14 each and they are a 1 piece design.
Pretty sure it had original plugs in it, replaced those with some autolites that were on sale, soon to put champion coppers in it though (personal preference).
Try champion part number 7989 it's one solid piece not 2 like motorcraft I've had good luck with them
i've had the beru ultra x's in for about 8K...no problems...no noticeable improvement either...starts the same (good), runs smooth...no complaints, but no better than stock...
Side note, Champion spark plugs suck. Use them in lawn mowers.
Champion is shit for cars. Leave it for mowers and weed eaters.
I would return them and get Motorcraft anyway. Champion is garbage.
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