x2 on the DG pipe and silencer , a FMF or better yet a Toomey will wake that beast up . Just make sure to re-jet for it . and pull the airbox lid OR they make these screen inserts for the airbox , you can drill holes in the sides of the airbox and put the screens in , more air = more power ( just add gas and oil in the proper ratio ) . I junked my airbox and went with a UNI pod filter with a outerwears wrap on it , and a 3" velocity stack . Not the best set up for wet riding , but for dry trails and sand it's the tits ...