As says, i own a m104 I-6 c280 and are debating what exhaust mod to do.
here we have no restrictions or smog testing, i have done a search but got mixed/confusing responses.

at standard i have the standard resonator>cats>back muffler.
And were wondering to either remove cat + resonator leave back muffler (using straight pipe)
or leaving the cat + resonator and replacing the back muffler with a straight thru "dump style pipe". <this will look good

I was wondering on sound and performance of ppl who have done either of these mods.

Thanks for help ppl :-)