* 4.6L V8 (non-DOHC): The recommended spark plug gap is generally 0.044 to 0.054 inches (1.12 to 1.37 mm).
* 4.6L V8 DOHC: The recommended spark plug gap is usually 0.040 to 0.050 inches (1.02 to 1.27 mm).
Crucially: Always refer to your owner's manual for the *precise* specification for your particular vehicle's engine. The manual will give you the most accurate and reliable information. These are general guidelines and might not be completely accurate in all cases. Using the wrong gap can impact engine performance and longevity.