I am torn between wether the C-One - Pipe 80mm - Tail 101mm, C-One Pipe 76mm - Tail 101mm, Blitz NUR Pipe Size 70mm - Tail 114.3mm, or the HKS super silent Tail Size 120mm, Pipe Size 75mm.

I have an st205 that is stock, so i do have a turbo (kinda). I am not looking for noises, i am looking for performance. Also, if anyone know of a better one let me know! I am still in my beginner phases of modding, so ,if you could, please help me underststand which is better. I am in Japan right now too, so if there is any better ones here let me know!

if your not concerned with volume, generally for a turbo car the larger the ID of the piping, the better.
c-one 80mm FTW.

Thanks for the help!

Will it produce more noise or less noise?