|
Just go for a sport filter in the original box/place. K&N, BMC,... but look one for your model. I think I got one of BMC (not sure) on my 23d.
Testing this on the test bench while chipping the ECU this resulted in 4HP gain.
Note it is a twin turbo with 200hp stock and my diesel particle filter is removed (empty and then inox tubing in it, and the end muffler is changed inside, just inox tubing)
It doesn't do much but gain is gain and every maintenance you save some money because you can clean your sport filter every 20.000-30.000km. (Or every year after the winter. You hear the turbo a little bit better as well, I think it is a little bit healthier for the engine.
Note, in some cases a sport filter on a BMW is bad and results in bad performance, graphics from the test bench could proof this.
The stock intake and exhaust of the X1 diesels is pretty normal/good so not much to gain.
Power gain=chipping
If you want you combine it with sport filter and DPF remove before getting your best settings.
Good luck with the mods.
|