Each stage is focused on the ultimate goal of increasing performance and fuel efficiency for your vehicle. In stage 1, software alone is used to adjust your car’s settings to increase the BHP, torque and MPG.
Stage 2 adds to stage 1 with more ECU tweaks while upgrading a few vehicle components – typically the exhaust, induction kit and intercooler. Replacing these parts gives a huge increase in performance without affecting fuel efficiency.
Lastly, stage 3 builds on stage 2 with even more upgraded components and ECU adjustments to guarantee that all-important power boost. It will depend on the type of car and engine which hardware needs upgrading. Usually, it can involve the fuel injectors, turbocharger, fuel pump and engine’s internals.