Originally Posted by Si-335d
Anyone have any suggestions or experiance of this ?
The stock 335D exhaust has three silencers/baffles,two at the rear and a central smaller one.
If you want more power (15bhp ish) combined with a better aural experience (term used loosely!) it's best to go completely straight through from the DPF back.
Internal noise from a s/t exhaust is far from loud,nor boomy,in fact the only time you'd hear it internally is when the rear seats are folded.
Adding any form of baffle/silencer to a custom exhaust is to my mind and experience, a waste of money,if you're considering doing that,you'd be better off just changing the stock tips to something with a bigger bore.