Hi looking to buy one of these but I'm looking for answers.

Can you get stage remap and would I need any parts for a stage 1 and what bhp would it put out after

What would a stage 2 need as to parts and what would be the bhp after and also are these cars a nice drive as my last one was a subaru impreza 2.0turbo sti prodrive,so a little bit different

Thanks for your help