Greetings SI 335d.
I have a 335d (286hp)that was mapped by Angel tuning in Banbury and by their figures got 50bhp and 70+LB FT even though I have not done a dyno run yet. Also had the DPF delete and I E G panel air filter installed. Goes like a dirty diesel should lol. I am thinking about the intercooler but need to justify the bhp gains before I commit. Not sure about the custom exhaust as every one I have heard just comes out like a whistle unless it is at idling speed. Interested to hear otherwise from 335d owners. Nice mods as well on your bimmer and I will be joining yopu on 19 inch wheels soon