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

Revainrating 3 out of 5

Poor quality ignition system parts

I have purchased Denso products in the past and they have always worked great. They have a groove au in the electrode, but some of them have the u off-centre. Ready? They were all about the same. I always center and space them myself, just to be sure.

Pros
  • Consistent test results
Cons
  • Requires outlet