This is a Hot Bodies Polished Aluminum Hot Rod Tuned Pipe for the HPI Savage X, XL, 21, 25, and Savage SS trucks.  As you can see in the picture, these look awesome.  These are a must for a serious Savage owner.  It will work on the stock Savage, as well as the Hot Bodies .46 conversion.  There is an internal baffle to make an awesome sound.  Make your truck stand out!