🔌 DENSO #5310 IK22 Iridium Power Spark Plugs - 4 PCS NEW Review

These spark plugs were a waste of money. After installing them in my car, I noticed no improvement in performance. In fact, my engine began misfiring shortly after. The only positive is that they were easy to install. Save your money and go for a different brand.

Installed on my 2011 CR-Z with 95,000 miles (about 95,000 miles) and the last 2km it has worked fine. I'll try to remember to post how they look after 50km. Overall, I'm glad I got these instead of expensive OEM spark plugs.

I know that in most cases a spark plug does not increase engine performance. What I have learned about ECU controlled small displacement multi-valve engines is that a colder temperature range with a spark plug with smaller electrodes allows the ECU to add more spark advance and a smaller electrode protrusion improves intake flow into the combustion chamber. Before and after dyno testing, Oscar Jackson from Jackson Racing and KraftWerks Superchargers proved this to be true on Honda Fits with the