Spark plug OEM FORD or Denso

Get the oem denso ones. There is nothing better than oem for that kind of thing.

This is what a 202k mile spark plug looks like on an 2013 Lexus gs350 daily driver. Pretty impressed with it overall. All 6 plugs look exactly like this.

For spark plugs, denso or bust

I've been running Denso (5346) IKH24 Iridium gapped .024 on APR stg1 for 48k miles and most recently on stg 2 with no issues.

Denso TT iridium are so far the best ones I’ve tried in terms of performance

if you want some good plugs, get some denso IKH24, they are 1 step cooler than stock plugs.. I change mine out every 20k miles..

IKH 24 plugs with stock coils work just fine. No cutout, rough idle or misfire.

Replaced stock with denso ihk24.

No discernible difference to me, positive or negative. But since I am running APR stage 1, I followed APR's recommendation.

I installed brand new denso ik24 plugs gapped at .026 and I am still getting misfires.