Review on 🔥 Laser Iridium Spark Plug NGK 4904, Part# ILFR6T-11 by Brian Weese

I only bought these because the cost was only slightly more than the OEM. The 4.0-liter Tacoma engine seemed to run smoother, but that's probably only because it said 45 km/min on the factory plugs. I'm inclined to think that the horsepower or torque benefits just from installing new spark plugs could be a placebo effect. I feel like these forks only deserve more money for their durability, not the performance gain. They're probably worth it for that alone. The time will show.