Spark Plug Gap

Spark Plug Gap 4.0L 1.32-1.42 mm (0.052-0.056 inch)

Spark Plug Gap 4.6L 1.05 +/- 0.05 mm (0.039-0.043 inch)

Spark Plug Gap 5.4L 3 valve 1.04-1.20 mm (0.041-0.047 inch)