NGK (5464) BKR5EIX-11 Iridium IX Spark Plug, Pack of 1

I have four of these plugs in my 2002 Corolla with stock ignition and they are Fantastic! I just checked them after 11,636 miles and there is no electrode erosion on these plugs (Checked plugs with a wire gap tool)! I would suggest to everybody who changes their own spark plugs to at least check them around every 12,000 miles or once a year (even if they are long life plugs, reading the plug will let you know about any potential issues with the engine). If your looking to put better plugs in your Corolla, NGK Iridium IX is an excellent choice. Fuel economy on the Corolla does slightly increase ~1% but every little bit counts! Another pointer is to drive conservatively and (if you can) anticipate traffic flow, curves, hills and don't ride the brakes - increase your following distance and let the car coast down the road. God Bless and happy trails!

Replaced my old platinum plugs, the old plugs weren't bad so there wasn't a huge difference, but I did notice a slight performance boost-- also installed new NGK wires.

These plugs fit perfect and installation was very easy on my 2005 Corolla. The car runs very smooth now, but the other plugs definitely looked worn out (they may have been original at 150k).
Recommended if it's time to change yours. For the price you cant go wrong. Shipping was great as always from Amazon!