Product ReviewsSpark Plug-Natural DENSO IK16

Excellent performance and value

Could not believe the change compared to stock Denso Iridium and another reputable Japanese premium company's Iridium plugs I tried. Engine runs quieter and much smoother, pickup vastly improved, economy at least 10% better ! My car has a CVT - engine runs at much lower RPM, even under acceleration, indicating it produces more torque thus the CVT does not need to rev it to accelerate. Excellent product - also the value !Read full review...

Verified purchase:  Yes | Condition: new | Sold by: hometownworld

Pays For Itself With Better Gas Mileage

Great spark plugs for my Corolla. My car now has more power and gets a lot better gas mileage. I noticed a big difference right away from the first start. Only had them about a month now and i also changed the spark plug wires afterwards for even better performance. So far i'm very happy with them and would recommend them.Read full review...

Verified purchase:  Yes | Condition: new | Sold by: originautoparts

DENSO IRIDIUM POWER PLUGS are very good, indeed!

I bought a set of spark plugs for my wife’s RAV4 (2003 model) last year (2021). I felt the difference, very responsive, quieter when idling on gear engage. Now, I bought again for my every day car Yaris (2011 model) . I’ll be changing spark plugs this weekend. Read full review...

Verified purchase:  Yes | Condition: new | Sold by: auspartsonline

Genuine, high quality and affordable.

The spark plugs are genuine Denso ones shipped from US. So, it was more convincing than those coming from China. They are of very high quality and came in their original box + each spark plugs were in their individual packets. The fast shipment was unbelievable. Highly recommended.Read full review...

Verified purchase:  Yes | Condition: new | Sold by: autopartssupply...

Fits like OEM, and work great

I installed last weekend and now I felt more power in the engine, really good spark plugs. I don't think need change spark plugs for long time, a little more save in gas too.

Verified purchase:  Yes | Condition: new | Sold by: sixityauto

Great Spark Plugs and are Working

Replace my old spark plugs with those. The computer have no problem to work with Iridium. I not feel any difference yet. The time will tell.

Verified purchase:  Yes | Condition: new | Sold by: autopa_warehouse

The product works as described.

Works well. The car accelerate better with this plugs installed. It also helps reducing fuel consumption a bit.

Verified purchase:  Yes | Condition: new | Sold by: originautoparts

Works great

Installed these on a 2000 GS300. The book said to use nothing but the dual prong plugs. But these work fine.

Verified purchase:  Yes | Condition: new | Sold by: dunamis001

High Quaility

Long lasting and great value you... Most Japan made cars come with either NGK or the Denso plugs from the factory

Verified purchase:  Yes | Condition: new | Sold by: capeolive

Iridium spark plugs

Used these along with coil packs and new NGK plug wires. Seems like my car is running much better.