I thought that they were gapped correctly. It was just that it was incorrect in the owners manual...so they sent out a supplement.
Did ford have some problems with the spark plug gap on a hand built engine. WTF. What are the best plugs for a stock 5.8?
The thing about the TR6's is they only last about 3k miles. I'm already on my 3rd set at 8600 miles.
Yea I have seen that. At least they are cheap. rule of thumb: change them with every oil change
What fails on the plugs?
I am curious about this as well. I was going to get the 13-6 kit which comes with TR6 plugs, not sure if I am ok with eating a set of plugs every 3000 miles though.