Nothing really new, they have been out a number of years. As mentioned, Combo-Flow is the company, out of the Tampa area. There are a few people running them. Buzz Varner has them on his Pro-Mod and Steve Kirk Jr. runs them on his XTF car. There are more, but those two come to mind at the moment. They seem to work well and do reduce the overall amp draw on your system by a good amount.
Monte