Truck heads and your heads are the same. Pi heads are all the same in a sense on a truck or a 99-04 stang. Since you have an 02 you dont need them. Pi heads more help the npi heads like mine the 96-98 gt years
1996 Mustang GT, 17x9 front and 17x10.5 cobra r replica rims, 255/40/17 front 285/40/17 rear at the moment,
o/r x-pipe flow master 40 series dump downs, cai/ram intake, 75mm c&l throttle body and plenum, pi heads and intake swap, msd wires, stock gears, untuned at the moment, no dyno numbers for now.