I need some opinion

[NicoHuski]

Hi, this is my secon thread :tongue_smilie: and i hope someone can help me.
My clio rs phase 3 is totally original but i would like to change the following:

-intake system
-middle exhaust without silencer
-no kat

can someone tell me what is the best i can use?

If i don't change the silencer can i have problems?

thank

Niccolò