ive been looking at upgrading my exhaust with something that will really help respond my turbo (stock turbs) , gain hp and loudness. Ive picked out my endpipe and liked the hks ti-high flow 120mm tip, i want a high flow cat converter, and midpipe to down pipe. i cant find one brand that has everything i want idk if you can mix and match or anything that probably what ill go with if i can

what do you guys know?