Originally Posted by obert
I like the idea but now if you need stock cats back on for some reason you will have to buy them. If you would of put strait pipe and kept the cats you would not have to buy new one if you need them.
I am suprised the shop put them on with out the insides
Yeah, a lot of shop don't want to do that, but if they just do a welding; they don't ask question....
And only 335 xDrive
(N55) have secondary cats, so I don't need them because N55 335i have no secondary cats.