also , in my opinion its not worth fitting a front mount IC as the gains aren't that high and diesels always run a lot better when warm and the straight through exhaust can be a bit loud but does let it rev quicker
they dont need back pressure like a petrol but it can start to kill the turbo seals when there is little back pressure , i run a totally unsilenced side exit on mine and have done 10k miles on it without an issue other than the noise !! although its not too loud and never been stopped with it , have done about 25k miles with that engine in now too