Your right, in 99 the 5.4L PI (Performance Improved0 motor started to ship (I think F-series got it first with Expys coming on line later in the year, my Expy is an August build with this motor) The motor is rated 260hp and 350 lb ft for an increase of 20 hp and 25 lb ft, also the torque peak comes at lower revs with a longer flater range, 90 % of peak torque from 2,000 to 4,000 rpm.

I test drove both 5.4's before I purchased and believe me, the differance is very noticable. I would say the 5.4L PI is easily the equal of, if not more powerful then an earlier 5.4l with Chip, Cat Back Exghaust and FIPK upgrades.

Petrol