🔌 6 PCS New DENSO #3381 U-Groove Standard Spark Plugs K20HR-U11 - Genuine Quality Review

These spark plugs have greatly improved the performance of my engine. They ignite smoothly on start-up and provide a stable and long-lasting spark. The U groove design also helps prevent misfires and ensures a more efficient combustion. The only downside is that they can be slightly more expensive than other spark plugs on the market. Overall, a great investment for any automotive enthusiast looking to improve their engine's performance.

They are advertised on Revain with a .044" pre-gap but all six of mine ended up at .037". I increased their clearance to .043" for my 2007 V6. 4Runner and they work great.

Tacoma's first replacement since launch. The price for 6 forks is unbeatable. Time will tell but they seem to be doing well. As most 2nd generation Tacoma owners know, most trucks came from the factory with Denso on one side and NGK on the other. When I pulled out the old plugs, the old Denso plugs were in better shape and had tighter gaps than the NGK. I'm not saying it's the best reason to choose any of the others, but it has motivated me to go back to all Denso's and not NGK's.