Not new, but since I had replied to this thread, I have installed an LST2 HT stock pipe on my aftershock instead of the HPI polished. It's far quieter with good power out of my LRP28 in it. It smoothed out the power and moved it up the RPM range. With the HPI polished pipe, most of the power was down low in the RPM's.
I use it with the aftershock coupler using nylon reinforced silicone tubing for a coupler with heavy zipties. The reason I made a note this is because the pipe is intended to use as a "one piece" exhaust system. That's the kind that uses little springs to attached the pipe to the header. It's held up great with how I have it for a good portion of last season.
They can normally be found at a pretty reasonable price on ebay. Should work ok on the savage like I have it on my aftershock.