i have a 99 f250 LD with a 5.4 with PI heads and im gonna put a new motor in it. What are the differences between the 99-03 5.4 in the f150/f250ld/expedition and the 5.4 in the superduty and the 5.4 in the econoline van?
Thanks

 

SD's don't have some of the exhaust emissions stuff, van's have a different intake. F150/Expy/LD are the same.