At the rear its just one back box on the left with a straight pipe, doesn't add anymore BHP, more for show I bought it from my mate but soon I wanna get an Eisenmann quad system. Their are some E46 330d videos on youtube and they sound surprisingly good for a diesel, but the eisenmann I will get will be a proper exhaust system compared to what I have at the moment. I go to all the BMW shows every year like Bimmerflex, Gaydon and Bluewater meets etc and have heard many Eisenmann exhausts and many people recommend them for BMW's.
My setup will be like that in the picture with the carbon fibre diffuser
Is that your 1 series in the picture what litre is it?
I've looked at miltek doing me a custom build resonated system.
Yeah that's mine, it's a 135i so 3 litre twin turbo. I also have E46 330ci M Sport convertible too