Originally Posted by Hotcoupe
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.
Thanks for the info, that's good to know. I will go CAT back straight through then. I am guessing when you say DPF back that would be a CAT delete too ?
335d MSport Coupe LCI:- 19" Apex EC-7's (8.5j ET35/9.5j ET33) Factory fitted Sunroof, BMW Perf Carbon Fibre:- Boot Spoiler, Mirrors & Front Lip Splitter, SSDD Carbon Fibre Rear Diffuser, Roof Spoiler, Black Kidney Grills, Red Calpiers, CKS Custom Exhaust, Wagner FMIC, ITG Air Filter, Sprint Booster, Quaife LSD, Weicher front & rear strut brace, Forge charge pipe