Thread: 04 GTP questions, seeking mod advice

Originally Posted by industrialfish

They are 2 heat ranges below stock on a basically unmodified car. Too cold can result in carbon deposits on the tip that won't cook off during normal operation, which can cause a hot spot, resulting in KR...

You want to run the hottest plug you can get away with.

True; however if you can run the colder plug (like I did), it isn't hurting anything.

Hell I had over 20k~ miles on AL103's and everyone always likes to complain that there isn't any life in them.

Run the 104's; gap them @ .050". Enjoy.