Did you mean what does it stand for? If so: Performance Improved. If not: I have no idea what you are talking about.

 

Run for.. as in "how expensive, what does it cost, how much bling bling does it take" to get the parts and install it.

It appears to be 1-1.5k and a huge PITA... like might as well pull and just do a complete tear down and rebuild..

better yet, just buy a P1 motor with less miles and more stock power and swap it in.

 

PI swap

Gears (4.10's)

Those would be the best mods you can do. After that think of what you really want from the car in the future and go from there.