Review on NGK SILZKAR7B11 - Get the Best 🔥 Performance and Longevity with NGK Laser Iridium Spark Plugs by Adrian Smart

After 98,000 miles on my 12 year old Impreza Sport Premium I started looking at the recommended 100,000 miles. That's when I discovered that the recommended replacement interval for spark plugs is 60,000 miles (oops!). This is the exact model number that comes standard on this dependable little four wheeler and they install easily. Ignition coils and a 14 mm deep shaft, 2" extension and 3/8" ratchet for spark plugs. The rear driver's spark plug was the hardest for me due to the wiring harnesses nearby, but this nerd finished all four in about 30 minutes. Do not coat threads with grease as these plugs are designed without necessity. I am happy with my purchase.