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Your cart is empty.Denso Spark Plug Denso's standard plugs have always offered a patented U-groove ground electrode producing for a larger, hotter spark. Copper core for better thermal conductivity. Machine rolled threads to reduce cross-threading and seizing . The plug insulator is constructed of purified alumina powder for extreme stress with 5 ribs to prevent flashover. Technical Specifications - 14mm Thread, 26.5mm (1.04") Reach, 5/8" (16mm) Hex Size, Gasket Seat, Resistor, Solid Terminal, Projected Electrodes, U-Groove Ground Electrodes, .044" (1.1mm) Gap
Robert Nolder
Reviewed in the United States on January 7, 2025
It’s a spark plug. Not much to say.
Matt Wilson
Reviewed in Canada on August 10, 2024
3 were back ordered, but I wasn't advised. After numerous attempts I was advised to wait, after 2 weeks, I cancelled and got other ones. 1 out of 4 plugs was useless to me.
Emi Lopez
Reviewed in the United States on July 9, 2024
Plugs arrived in great condition. One unopened box of 4 and an opened box of 2. The gap was wider than needed so I regapped it. Always check the gap when if they are pregapped! So far no misfiring or issues. Will update if there is any changes.
John Wedmore
Reviewed in the United States on February 4, 2024
Plugs arrived loose (outside individual boxes within mailer) which I should have immediately returned. I went through and installed them in my truck anyway after checking gap and regapping to spec and torque requirements and immediately upon firing the vehicle up it had a check engine light and multiple misfires. Went through the whole plug install process again to check if install was improper, it wasn’t, and ended up going to dealership to buy directly from Toyota. Repeated the install process with new plugs and misfire/idle problems disappeared.In short, do not buy spark plugs from Amazon, not worth the risk of serious damage to your vehicle. I’m upset that I missed the return window on these but hopefully this review saves someone from making the same mistake I did.Google search “Amazon bad spark plugs” and you’ll see thousands of results describing exactly what u went through with these plugs. Never buying automotive parts from Amazon again after this experience
Shannon Duncan
Reviewed in the United States on August 14, 2023
Great product and super price
Tom
Reviewed in the United States on June 23, 2023
At 74,000 miles was time to change plugs, added these as they are direct replacements of factory. My Tacoma definitely has a bit more pep and improved milage showed on the last tank.
alessio
Reviewed in Italy on July 31, 2019
Venditore onesto e comprensivo
José naveiro mateo
Reviewed in Spain on January 7, 2019
Buen producto
lettucedog
Reviewed in the United States on April 13, 2017
The Denso K20HR-U11 spark plugs fit and function as advertised. They install smoothly with anti-seize, and the plug gapping was relatively consistent with about .006 variation. The gap spacing on these plugs adjusts easily with a spacing gauge. The packaging was sufficient; the threads and electrodes are protected with a simple plastic sleeve. I would recommend these plugs to anyone with a Toyota 1GR-FE 4.0L V6 who is looking to maintain the stock engine performance.
DADOOM
Reviewed in Italy on November 1, 2016
Montate su una MITSUBISHI COLT 1.1 a 3 cilindri,il motore gira regolare. Nessun appunto da fare. Buon prezzo. Le ricomprerei
G. Benoit
Reviewed in the United States on August 22, 2014
Great Spark Plug from Japan. They're OEM, don't cost much, and come pre gapped.I changed them myself (it's pretty easy if you follow online tutorials) on my 06 4Runner V6 at 110k miles. I bought it at 72k miles, and figured changing the plugs might improve the gas mileage. The replacement interval is supposed to be 30k miles, but the engine was still running great at 110k miles on the original plugs. The electrodes were pretty worn, but it did not make much of a difference when I changed them. Mileage has not improved that much (mind you I'm still averaging almost 23mpg over 40k miles).
Joe Fish
Reviewed in the United States on August 11, 2013
I bought my 4Runner from the dealer with 110,000 miles on it and was told they did the necessary tune ups. Needless to say, the car ran find and I figured, since theses are copper plugs I would replace the plugs about every 30,000 miles for normal tune up. When I pulled the plugs, I could not believe what I saw. The plugs were original (Denso on passenger side and NGK on drivers side like the factory installs) and had gaps of 0.50 to 0.65 compared to the preset gap of 0.39 to 0.40. The plugs were obviously very old and far out of spec yet the 4Runner kept on running. It even recently passed smog. I have never seen old copper plugs like this last this long and still be running. A real testament to the quality of the plug.
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