Yeah, that's the silencer that came with my Invidia exhaust. Having it in makes a pretty big difference in the amount of "droning" I hear. When I let off the gas or if I'm just cruising, I hardly hear the exhaust. It still idles a little deeper and louder than stock, but it's mostly just when I accelerate that you can tell it's different than stock.
Without the silencer, letting up on the gas sometimes produces a "burbling" sound, but I don't notice that with the silencer in. For the most part, I like the sound with the silencer in, I just wish it was a tad louder at idle and during acceleration. I don't really like the looks of it though.