exhaust system

Has anyone gotten the competition Werkes chamber delete for their new gen 390? I was thinking of installing it on to my ‘22, but I’m not sure of the O2 sensor location so I don’t know if I would need a piggy back or not.

So I have a generation 1 RC (2014), is there a solution of getting rid of the heavy OEM pre-silencer / decat but keeping the clean exhaust look? I don’t want a long pipe but I would like a lighter pre silencer which makes a bit more of a meaty sound. Does anyone know anything like that?

My bike is 2018 KTM RC390. I wanna upgrade the exhaust system, here are some options for me, please give me some suggestions. 1. Tyga full system, wss300 or serpent 2. Tyga header + Akra slip-on (15-16) 3. Competition Werkes Cat Delete + Akra slip-on I wanna know what's the advantages and...