PA
bumper height
5,000 lbs. or less GVWR 24" front 26" rear
5,001 lbs.-7,000 lbs. GVWR 27" front 29" rear
7,001 lbs.-9,000 lbs. GVWR 28" front 30" rear
9,001 lbs.-11,000 lbs. GVWR 30" front 30" rear
from frame or factory bumper
(which ever is higher)
3 inch body lift max.
Frame height
5,000 lbs. or less GVWR 24" front 26" rear
5,001 lbs.-7,000 lbs. GVWR 27" front 29" rear
7,001 lbs.-9,000 lbs. GVWR 28" front 30" rear
9,001 lbs.-11,000 lbs. GVWR 30" front 30" rear
Tires may Not stick out past fenders. This is strict where I am but lax in other areas.
Flares are allowed but no more than 3 inches wide.
Edit : PA is likely to change this law to frame height only.
Rear Block
3" block in rear max
(suv) max rear is 1"
Shackle
2" over factory length shackle max
And headlight
(truck) headlights below 54 inches
(suv) Headlights must be below 48" from top of headlight
Dead Link Removed
Note Pa is kinda odd with the differences from SUV to truck. You can register your Explorer as a truck or as a wagon. When registered as a truck my understanding is your ex is goverened by the laws of truck and not those of SUV. If registered as a truck you will have "truck" on your plate.