Big Gun EVO U Turndown End Cap Assembly - BlackIf your muffler is horizontal (oval shape is horizontal and not sitting vertically) then you need a sideways end cap assembly If your muffler is horizontal (oval shape is horizontal and not sitting vertically) then you need a sideways end cap assembly This end tip assembly may not fit older style Big Gun mufflers like EVO X, EVO Race & EVO Limited One piece high temp coated turndown tip for mufflers that sit vertically 4 button head base plate screws