the right side muffler goes at a upward angle so the rear of the muffler is higher then the floor . I have moved the down tube every way possible I ground the bell housing that did not help . I switched pipe that the muffler goes on from the left side to right side and the same thing happens the left side fits perfect and the right side goes at the upward angle it seems to me that the down tube is to long has any body else had this issue.