Spark plug Champion or BRISK

Brisk plugs off Parker performances page. The brisks hold there gap and seem to really last

We changed that spark plug and the customer was happy with the magneto drop. That spark plug worked fine on a Champion spark plug bomb test.

Champions quiet redesign of their plugs to match Tempest made up my mind. It matters, and Champion is just trying to save face.

I'm running brisk One step colder plugs at 0.024 Gap with my eqt stg 2 tune. they are amazing

Brisk LGS plugs basically remove that L shape off the spark at the end. I would expect it act more like plugs do when we index them to the fuel flow. such that you get a better flow in the combustion chamber more consistently.

I always run champion platinum in the coil rail 4.0s. Sometimes engines are particular.

would suggest plugs, RS7 or Brisk 12's (cheaper) but coil packs are not needed.

I'm getting some knocks in all cylinders in the first revision, more than I did with the Cobb OTS map and stock spark plugs. Hopefully it gets sorted out in the next couple of revisions and if not, I'll have to check the spark plug gaps or maybe re-run with the Cobb OTS and see if the knocks are due to the tune or spark plugs.

Overall, the power delivery is great.

I would return them and get Motorcraft anyway. Champion is garbage.

I wouldn't do the Brisk plugs if you're not tracking it hard. They susceptible to fouling up unless you drive it like you stole it every time.