how to tell pi heads apart

[96SCstang]

i am going to look at/purchase some used pi heads from a dude by me. i was just wondering if there are some markings i could look for to let me know for sure that they are actually pi heads. you never know sometimes with people and i would just like to be sure. anyone have any suggestions on what to look for? thank you

 

[Midnight2V]

Square intake ports and a heart shaped chamber. NPI heads have a tear shaped intake port and a circular combustion chamber.

 

[96SCstang]

thank you very much....now that you have pointed out those two things it's very obvious. should be easy to tell now.

 

[96SCstang]

2003 mercury mountianeer heads should be fine right? they have the heart shaped chambers and all, but all the coolant passages and such will be good also?

 

[Midnight2V]

Yes, other than valve cover bolt patterns everything should be fine. You definitely get a PI style intake manifold and cams as well. The manifold and cams rather than the heads are where the majority of power from a PI swap comes from.

 

[96SCstang]

cool....thanks for the help.