they arent really. Lok at a dyno chart side by side. Stage 3 at 3k rpm makes 300hp and the tdo5's also make 300hp at 3krpms. Its just that at 6k rpms the Tdo5's make way more power. Peopl perceive this as lag. when in actuality it was making more power all along you just get hit with such an extream amount of power at the end.