Review on 🔥 Enhance Performance with NGK Iridium IX Spark Plugs TR55IX # 7164 by Kyle Ahmed

Bought these spark plugs to replace platinum ones that lasted about 30,000 miles. the hardest material on the spark plug market. I expect at least 70,000 miles before replacement which I can't confirm only time will tell. However, I did notice a significant difference in performance. I replaced the spark plug coils with Summit high performance coils as I was still having occasional engine misfires after changing the spark plugs. Mileage per gallon. If you have replaced the spark plugs and are still having trouble running the engine, replace the spark plug wires and/or coils depending on what your engine uses. Replace them all at once, not just one or two. High performance Crown Victoria engine. GET GET.