u/Far-Alps2233

Camaro Rs 2011
Has been dressed up to look like a zl1. Has a custom exhaust tip that makes it sound very nice, ive been asked if it was a v8 because of it and i have been told by mechanics i shouldnt change the exhaust. I plan on making the car more powerful but i dont know where to start and what would be smartest, i dont know a whole lot about cars and need some help. I have a cold air intake on it though. Everything else is stock. Any thoughts on why i should do to the car? Power wise