NGK3657 Laser Iridium Spark Plug IZFR5K11 (6 Pack)

Not an expert but I've been using these types of plugs for a while and from my inspections they are legit and so far working great. My Honda pilot was idling a little rough. Swapped these in and she's smooth again.

Just used these in a 2006 Honda Ridgeline and it’s running better now. Plugs came quickly in original packaging. Quality as expected for NGK - consistent gaps and solid construction.

Identifiers of copy vs. Legit. 1. sharp angles on caution triangle in the back. Fakes have rounded corners on that triangle. 2. Manufacturing stamp on the facet of 5/8 nut area. Fakes have none. 3. The arc of the lead to the tip on fakes are angled, the lead on the legit ones are square with the threads. 4. When you get them, put them on a multi-meter. You should get consistent resistance between all 6 plugs. The fakes are wildly inconsistent. These passed on all 4 counts and even came with a seal of authenticity.

This is my second time to install these in my 2007 Honda Odyssey EX-L. They are working great and did work great the first time. The only reason I am giving them four stars is because they only lasted 40K miles for me the first time around. I thought they were supposed to go 100K or a lot closer to it. Still a great product, and I'd buy them even if they only go 40K.

As advertised

I use only NGK spark plugs for all my cars, exact gap no need to check or adjust, no misfire, smooth acceleration

Wrong size even though app said it fits. Went to Monument Auto here in town and got the correct size. Save your sanity, go to knowledgeable shop to get auto parts even if it costs more. Don’t bet burned.

maybe a bias in my review but i like NGK in all of my cars, i feel like they are the best value and are factory sparkplugs for honda and toyota's