2018 Honda Civic Si

Hello, New civic owner here.

I had a few questions in regards to modifications to my Si. I'm wondering if lowering springs are possible with the new sport mode that already affection the suspension. Also, does anyone know any aftermarket exhausts to get rid of the USB-plug looking exhaust that comes stock on the vehicle? I want something loud, but not like a lawnmower. I use to have a Scion tC lowered, exhaust, the works, etc. Just wondering how far I can go with this vehicle given how new it is on the market and how different it is from my previous vehicle. Any help or advice would be awesome.

Thanks,
Jordan