question about tail pipe

I was wondering, does anyone ever watch the TRUCKS show on spike tv channel? 2 guys named Ian and Kevin?

I watched an episode they were doing and showed how you can hide your exhaust pipe/tail pipe... But i dont recall what this was called, the product they had that is. Does anyone know what im talking about? I have talked to a few people about it, and they dont know what i mean. Its like this box , if i recall, and you can put the tail pipe thru this so its hidden in a sense. ANyone out there know what i mean? IF SO, what is this part or the whole thing called? Id like to do this to my trucks tail pipe.

I dont want a makeshift thing made, Id like to know if anyone knows what im talking about, and if so, can steer me to the info needed to have this done to my truck. I have a 99 dakota club cab.
thanks!!