Essentials for the automotive slalom

Hello dear people, because of many answers here in the forum I have now left my finger off the BMW E36 Compact (325 remodelling) and after many reflections and discussions with sponsors (parents and grandparents) decided to upgrade my private car, as standard BMW 318ti Compact, so that it is ready to start in class G. now my question to you, who are partly already a little more experienced:What do I have to explicitly upgrade now, so that I have a chance to get there? b? * Not much has been done about it so far only a supersport exhaust system has been installed in the course of a renewal of the exhaust system (because completely rusted) and an M rear spoiler. What should/must be changed: – suspension (Which is best? KW V3,BS 16, HR?, Does it have to be threaded at all?) – wheel tyres (Which rim size?, Which semis are the best?) – cage (need?) – What else should be done to be competitive? – Kan I hope you can tell me some things and help a (again) beginner. I thank you already in advance and look forward to a hopefully lively exchange round. Dear greetings Stefan PS: should I have missed a similar thread, I would like to apologize and a small reference to it. (Can then be done again in no time)