sleeper bird said:so no 1997s were pi heads just from then on up.
sleeper bird said:i got that part but my engine is all together with 80,000 babied miles and the more i read about everyone changing to the pi heads just had me wondering how to tell without taking anything apart.
Actually the Crown Vic didn't get PI heads until 01.cjchevez said:Well from 99 up mustangs and CV not sure but I think 2001 explorers 2002 .
Not sure on the exact years other then the mustang .
There is a pretty good article on the tech pages here .