All GReddy turbo kits exclusively use GReddy Spec Mitsubishi Turbochargers. Vehicles that are already equipped with factory turbochargers have engines with large potential for power that cannot be fully obtained by using the original turbos. After upgrading the exhaust, intake, blow-off valve and intercooler and adding more fuel and boost, big gains can be found. By also replacing the stock turbocharger with a properly sized GReddy turbo upgrade kit, you can experience new levels of power.