Denso(3421) SK20HR11 Iridium Long Life Spark Plug, Single Plug

My FJ Crusier 2007 had all the dash lights turn on. Checked the fj manual, and all said to take it to a dealer. Instead, took it to an auto shop (shuck's) and got the computer read out. The codes said, I might have an issue with the cadillac converter. Casher said, it's almost never the convertor, try new spark plugs.Bought these sp's and installed myself. Gapping for fj should be 0.38-0.43. These come at 0.44. I didn't make an adjustment. Installed watching a Youtube video. Took about 2 hours. Make sure you purchase a 3/8 inch ratchet with a torque measurement ($40) in/lb, 3/8 - 1/4" ratchet convertor, spark plug bit with magnetic bit (must) and correct lube.After installation, turned off all dash lights. Car now runs at fj standard 550 rpm (was at 1000 rpm). Saved a ton of cash doing this myself. The sp's were brownish at the ends when I took them out. I will now swap out every 30k (recommended). Should only take an hour now.

They have passed the extended drive test:Have several thousand miles on these Denso spark plugs now. The 2008 Toyota Tacoma 4-cylinder is running smooth, maintains fuel economy, and has consistent acceleration .

These worked fine even though the Amazon advisor said they are the wrong plug for my truck. It’s the exact same thing. The gaps were not all the same. I had to close the gap down on 3 or 4. The Gap should be .040” nominal. Some of these were around .045”I replaced the plugs at 120,000 miles and the old plugs looked fine. They were still gapped at .043”That was a recommended service interval so I went ahead and did them. The dealer wanted something like 600-700.00 dollars to do it. I saved over 600 dollars doing it myself.

Identical to the plugs that came in the engine from the factory. Top quality. The plugs still have the original gap after over 100,000 miles. Changed to avoid risk of damage to the aluminum threads in the engine from buildup of combustion by products.Third time to change the plugs at a little over 300,000 miles.

item shown signs of damage, the ground electrode was bend

After replacing the original spark plugs on the 2019 toyota tundra with the Denso (3421) SK20HR11 Iridium Long Life Spark Plugs - I have driven the tundra for over Five thousand miles and I've noted a little more power In the acceleration of the vehicle.

Es exactamente el producto; el comportamiento del motor cambió después del reemplazo.

The plugs arrived quickly and in good condition. They are the same as the original ones for my 2007 Tacoma and came pre-gapped, so installed quickly and easily.My truck still had the original plugs with over 190k miles on them, so these were a needed change. I noticed better performance, idling and power after the switch.