ACDelco PF2 Professional Engine Oil Filter Is 20-25% smaller in size, yet has more filtration media for greater capacity Has 10 times more open area in the core for improved flow Has a steel shell, threaded plate assembly, and leaf spring that can all be recycled Has a non-metallic cartridge that can be crushed to remove oil and can then be used as an energy source Has a lubricity gasket for reduced installation torque