The test car did that with a 4.6L... Up until now, if you used the same heads, cams, intake, exhaust combo on a N/A 2V 4.6L and a N/A 2V 5.4L, the 4.6 makes considerably more power. The best N/A 2V 5.4L is flirting with just under 300 RWHP currently. Similar N/A 2V 4.6L cars are at 340+...