its very much depends on what car you drive though. For this case, its a new colt hence there is nothing much u can do. But if you're driving wira, then your option is way alot...
should jpj havent restrict cc upgrade limit, if i was not wrong, gsr used to be around 5k region. So to BOT vs gsr swap, for sure gsr swap make more sense, u got better engine, bigger displacement and ready to go. On the otherside of BOT, your engine still vulnerable.
there is some hefty price need to pay for being unique