This may be a really dumb question but what does PI stand for ?

 

Power Improvement. Refers to the second generation 4.6 SOHC heads. 99-04 Mustang GT.

 

Or some call it a Performance Improvement

 

Private Investigator

 

Pi = 3.1415926535897932384626433832795

 

Hahahahhahahaha

 

haha ok thanks everyone
i have a 2000 mustang gt is there any difference in the motor in that from the 04 one ?

 

Well you might still have the plastic style crossover on your intake, thats bad. And I believe early year cars were Romeo motors, and newer cars were Windsor. Some minor differences here and there... (cam girdle vs cam caps...etc...)

 

yours is 4 years older...