NGK (1422) ILKR8E6 Spark Plug - Pack of 4

I got sent the wrong part # plugs but the seller immediately fixed the issue.But these plugs ARE my goto plug for a performance n14 mini. I am running them in my full bolt on , big turbo , custom tuned 2011 n14 jcw.. I'm only running 23psi now but sofar the engine has been running much more crisp in high boost with these plugs.. they are a step colder than standard S plugs but oem for jcw engines and if you up your boost on your S anything more than 5psi , you'll need colder range plugs..trust ME

ordered a set of these about this time last year, no issues. then my turbo ate itself (not the fault of the plugs), and so i upgraded alot of internals. the old turbo did leak/burn a little oil, and those original plugs look like i should replace them (plus i'm chasing an engine stumble, might as well rule the plugs out)So i ordered another set from this same seller. I just went to put them in, and one of these things is not like the other. I get things happen, so I just emailed the seller to see how to proceed. I'll update this review after I hear back from them.Update- they sent a replacement. Upgraded star rating

I have a Kia Optima Tgdi 2012 with 63k with the OEM plugs. After considering many brands and heat range, I decided for this and have a gap of 28. Good Lord.... is like having a different car, one floored with the economy mode on, the car shirp the tires and the traction control blinks 2 or 3 times but when the economy mode is off, the traction control steps in to halt the fun. You will notice a dip in the gas economy and a little rough when idle in the cold but just for a few seconds. You need this plugs. My only mod is short ram K&N filter and that's it. I have read that this plugs are prone to break but you need to research and you will see that are for folks that gap the plugs either too wide or too close. I gap mine at 28 and haven't looked back for about 2 weeks and a lots of wide smiles in my face. The cheapest tune ever!

Great price for spark plugs that were double the prices at the dealer. Exactly like factory.

These plugs are not Hyundai Sonata recommended but my 2.0T loves these plugs. Plenty of 2.0T drivers have used these plugs so I knew I was not going out on a limp. There is a noticeable positive response time between accelerator and the engine reaction. The 0.7 MPG improvement.

Just I want inform you that this items is original. I recommend. 👍

This is the latest recommended that replaces the stock part#.Idles smoother.No mpg average yet, but will update in a month or two.

After a tune, installed these plugs. They are 16mm instead of the factory plugs that are 14mm.