Are these sparkplugs genuine?
- Thread starter slybunda
- Start date
That ground electrode sure don't look right where it attaches to the plug body.
I've tried a couple set of IT24s from them in the past, the price was the only thing that stuck out, they idle was substandard with them.
I've tried a couple set of IT24s from them in the past, the price was the only thing that stuck out, they idle was substandard with them.
I don’t see anything wrong with what you have pictured. The ground electrode weld is ugly, as mentioned, but its also highly magnified. The plastic protection tube is typical Denso, and the markings appear genuine.
I recently purchased some Denso spark plugs thru reputable source that were made in China. They work fine.
I recently purchased some Denso spark plugs thru reputable source that were made in China. They work fine.
You will know in about 12K miles.
They probably are genuine if they came from a reputable shop that's listed on Denso's site 
I just ordered 4 of those same IK20TT plugs, and mine were US-made. They say assembled in US with foreign content. They arrived yesterday.
Mine were shipped from Factory Motor parts (ordered from Rock Auto). Strangely, 2 were shipped from NC and 2 from MN, but all 4 were US-made.
I just ordered 4 of those same IK20TT plugs, and mine were US-made. They say assembled in US with foreign content. They arrived yesterday.
Mine were shipped from Factory Motor parts (ordered from Rock Auto). Strangely, 2 were shipped from NC and 2 from MN, but all 4 were US-made.
Nope. I wouldn’t use those. Look at how the upper electrode is attached to the plug!
Could be the macro zoom making it look more pronounced, too the naked eye it looks smooth but dunno that's why I ask the pros on here
Denso makes plugs in China so they are most likely legit, however I'd use this site as a guide.
https://www.driven2automotive.com/s...9qyBFB0rDteT6uMrZ8FJFXoOGiaLhAEP8E1Rz7PcFidWC
https://www.driven2automotive.com/s...9qyBFB0rDteT6uMrZ8FJFXoOGiaLhAEP8E1Rz7PcFidWC
I just noticed you're in the UK
Perhaps Denso makes those in China for the Euro market, while the same plugs sold in the US are made in the US.
They do not have left hand threads. There would be a different part number for ones with reverse threads.
According to this page from Denso EU, all four plugs in the same box should have the same codes.
Just got back from eurocarparts, another large UK retailer, asked them to show me one of their plugs and it's also made in china and looks the same as the ones I got from partsinmotion.
Guess the china ones are what's available in Europe now.
Guess the china ones are what's available in Europe now.
If I were making counterfeit plugs, I'd LOVE information like this so I know how to make them look as authentic as possible !
Gee, in the UK, I would have thought all motorists would prefer KLG or Lodge plugs. 
I just bought denso irridium plugs for the cavalier not too far back. The weld looks really rough and not machine welded. I don't remember the tip looking like that either. Apparently they aren't to be used in helicopters, motorized parachutes, gliders or airplanes?
