I have a minor crack in my intake. So just a small coolant leak. I am thinking of replacing it with the Ford Racing Performance Improvement intake that AM has for sale. It says that you need to have PI heads to install.
Here is my question, what are PI heads, and how do I tell if they are on my stang. The previous owner had done some mods to the motor, but I'm not sure what all they did.
Also, are there any other intake manifolds available that would result in more HP/TQ without having to change heads.