Review on Enhance Performance with DENSO # 3461 IRIDIUM LONG LIFE Spark Plugs - SXU22HCR11S (4 PCSNEW) by Mike Davan

I've been using a standard 15mm mini fork socket since I bought the car five years ago. However, these plugs are hex and require a 16mm socket. The standard 16mm head is too thick to fit in this space. So I ordered a 14mm 12 point head hoping it would fit but I doubt it. Just take a look. If not then I'll be mad because Denso says they fit in my car. "Fit" to you Denso folks means I should be able to tighten the plugs. When 12-pt 14mm doesn't work, I go to P on Denso from every possible place. I have a little doubt that the seller will give me my money back after oiling a few of them. (small leaks at the valve cover gasket).