570 votes
I said from the get go that the Densos were running like ****. Especially at wot around 110mp/h it felt like the engine was hesitating and lacking power. Idle was smoother with the Denso though.
I have the denso ikh24 and no problems for me.
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.
Back in March two days after finishing the Water Pump replacement it started misfiring. I started with replacing the spark plugs with OEM Denso's, but that didn't fix it but was VERY NECESSARY.
No discernible difference to me, positive or negative. But since I am running APR stage 1, I followed APR's recommendation.
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.
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