I got my new NGK TR55IX in the mail today for my 2000 Escalade 5.7. Anyway I was searching online to see what the proper gap is and I see factory is .060 but some say these trucks respond better to .040".
What should I gap these things to?? If it matters im more concerned with mileage then power.
What should I gap these things to?? If it matters im more concerned with mileage then power.