Spark plug Champion or Denso

ive ran the denso plugs in my stage 2 gli, and they worked great, had no issues with them.

Denso IKH24 plugs gapped to 0.024". 6,900 miles. APR Stage 2 tune. Only issue was CEL error when we installed the Unitronic downpipe and flashed to the stage 2 tune. After troubleshooting and contacting APR, they had my shop re-flash to a stage 2 beta file, no more CEL error.

IS38 APR tune with Denso IKH24 plugs, no brainer cheap insurance.

I did swap in Denso IKH24 at APR recommendation. Runs nice and have no issues to share

Had these on my MKV and they made the car smoother too.

after installing the new plugs: 1- yes, the idle went down to around 780 (from 820-840) 2- the needle is rock steady.. you reeeeaaally have to fixate on it to see any fluctuation at all... 3- this is the weird one: power is smoother. Not "more power", but what I used to call "silky acceleration" when I raced Formula 5 years ago. hard to explain other than to say that the car outputs the same power without the drama, smooth... BTW, my car has 2100 miles on it.

Mine came out the box .028 and I left them as is. The plugs are 1 step colder so its already a plus. The car does run smoother through the rpm and does idle smoother.

Currently just swapped to Denso's IK20 like 2 months ago. They run pretty good. But now its mid summer over here and the car runs a little bit underpowered at those high temps.

I have the 24's, not impressed.

the densos work fine, the point of swapping is not for any performance gain, rather to prevent shattered ceramic from raining into your cylinders