E3.68 Premium Automotive Spark Plug with DiamondFIRE Technology - Pack of 1 | High Performance Ignition for Cars, Trucks & SUVs | Ideal for Racing, Off-Road & Daily Driving

Value for moneyWorks as intended and promised. On independent tests, outperformed better brands, including original Japanese brands. Expensive but worth itLove themI haven been aware of this new design for some time now through YouTube and E3's own website and have been curious about using these plugs. Since there are no E3 retailers in New Zealand that I'm aware of, I'm glad to find them through Amazon. I used these plugs in a 05 Mercedes C180 Kompressor as a OEM equivalent as per E3's online catalog. They were as simple to install as regular spark plugs. No gapping required with the electrode design. They were significantly cheaper than the OEM NGK platinum plugs at only a fraction of the cost, even when i include shipping. I've driven for 2,000kms on the E3's now and they perform just like the OEM plugs. Whether they produce more power or save fuel I cannot be certain but I'm more than satisfied that they saved me the purchase price of the very expensive OEM plugs. I hope they will continue to perform with a similar durability and service life and I guess with that time will tell but so far so good.Installed these on a 2018 Tacoma TRD sport. Lowered mpg from 19 to about 16.5. You can not gap these plugs. I figured E3 knows what they are doing after cross referencing their site and saying it fits my model/year. Took one of the plugs out and measured the gap. It was at .045” and according to Toyota OEM standards it should be .032”.I am going back to OEM plugs. You will pay more but you won’t waist hours of your time installing and reinstalling.One upside to these plugs is no misfires and the truck is very responsive when pressing the throttle. But I wouldn’t trade that for a substantial drop in mpg.I don’t believe they are going to cause any damage to the engine but they are not efficient.Install this plugs they work well I will be purchasing this product again!!I installed these plugs and my utility vehicle refused to start after the instillation. The UV ran perfectly fine prior to installing these plugs, I was simply upgrading plugs - so I thought……. I now cannot get the plugs out of the engine, so I started doing some research - it appears many others are having the same issue as cannot remove plugs, plugs broken and also creating stripped plug holes. I am taking my UV to the dealer and if there are any major issues I will be contacting or my lawyer will be contacting this supplier for the expense to repair. Do not buy these plugs.I needed new spark plugs and these worked great! I haven't used them for long enough to tell anything else.No misfires, unsure of life span on them. I'm 13,000km in (often hard useage, drove 12,000km open loop)UPDATE: 30,000km. Still no issues. I cleaned them, they look good as new