Full Length headers,Offroad X or h pipe for 5.4 4x4
#1
#2
The Lightning tuner websites have a variety of full length headers. I've only seen one place that lists a regular F-150 5.4 4X4. It's here:
http://www.secureperformanceorder.co...ord_truck.html
http://www.secureperformanceorder.co...ord_truck.html
#3