Review on Denso (3381) K20HR-U11 Traditional Spark Plug: Enhance Engine Performance with a Single Pack by Tommy Penn

Denso K20HR-U11 spark plugs fit and perform as advertised. They install easily with anti-seize coating, and the connector gap was relatively constant, with an error of about 0.006. The distance between the gaps in these plugs can be easily adjusted with a gauge. The packaging was sufficient; The threads and electrodes are protected by a simple plastic sleeve. I would recommend these spark plugs to anyone with a Toyota 1GR-FE 4.0L V6 who wants to retain the performance of a stock engine.