DG has been producing performance oriented exhaust systems since 1976. Their first focus was on dirt bikes, then they shifted their focus to ATV's and street bike several years ago. Once again, DG is re-entering the dirt bike world producing some of the same great exhaust systems that made them famous. Of course now DG also offers mufflers suited for 4-cycle engines too. Besides exhaust systems, they also produce a full line of quality ATV accessories such as nerf bars and front bumpers. Rounding our their product line are their carburetor kits and carburetor jets to keep the fuel flowing to your engine. Dennis Kirk has the largest selection and lowest prices on the entire line from DG.