got installed yesterday, also deleted 2ndary cats. I am always amazed how bloody heavy the OEM exhausts are on all BMW's. With the deleted cats it was easily a 40 pound weight shavings. Sound, just perfect. I am used to my E92 M3 so I have to get that sound out of my head, but compared to stock it is perfect, has a great low tone to it and no droning at all. Between the weight savings and 2ndary cat delete, the butt dyno seems to have picked up a few ponies..
