Digging around the interweb, I learned that the Performance Edition was a $550 upgrade pack that included black kidney grilles, PPK software and a cheesy badge. "i" models needed to have sport/M sport pack and "xi" models needed M sport. It was available as factory order or port installed. I guess it represented good value for money considering the number of owners plunking down $800+ for the PPK installed at their dealer. None of my research indicates that these cars received the PPK 2 hardware upgrades and being priced so low, I'm sure they don't have the upgraded cooling capacity.
Anyway, I am about 99% certain that I will fit this kit soon. I realize that it leaves a lot on the table but factory-backed reliability and perfect drivability are important to me. I don't feel the need to chase every last ounce of power anymore.