Hi guys! So i am not too familiar with exhaust systems but i've been really looking into them.
I love this one for it's sound and price and i'm just a bit confused....link to one i want to buy here: MAGNEX CAT BACK EXHAUST SYSTEM BMW E46 325 / 328 / 330 | eBay
Now on a normal stock oem e46 exhaust system i'm confused because i don't know what this third thing is (look at image)
is that the cat? would i have to remove my catalytic converter to put this on? i know what a cat does but i have no idea what it looks like on my exhaust and im assuming its this third box
i know the first is the muffler, second is resonator, but what is the third thing?
thanks for your help guys its very appreciated!
Sorry the image came oout so small...if anyone knows hwo i can upload a bigger one let me know