Review on NGK 3403 TR55GP G-Power Spark Plug - Single Pack (SEO optimized) by Alejandro Dabney

My car is a 2003 Ford Expedition with a 5.4 liter V8 engine that has 118,000 miles on the odometer. While cruising down the freeway at about 70 mph and in overdrive, I began to lack power and flex under load. I am a master mechanic with 30 years of experience. Needless to say I was a bit skeptical about this set but I read all the reviews and decided to give it a try. After installation together with new coil packs (DG508) the engine power increased by at least 25%. It was like day and night and I was just thrilled! I have driven about 1500 miles with these spark plugs and they are great and work great. Buy these new spark plugs and you won't believe the increase in performance!