Unfortunately not , due to the engine needing to flow more air and fuel it would not be safe to push the engine harder without the relevant upgrades, there is many differences that ‘look the same’ for instance ford focus ST and RS model both have the same running gear but a RS stage 1 will be much faster than a ST stage 1 and this is mainly down the minor differences between the two i.e. turbo and injectors, therefore the engine is capable but the parts around it need changing to benefit from the stage 2 software.