The can is hitting the top of his fullbores... It clears the OEM plastics just enough... I did bring it up another .250" for future orders.
Just lob off a piece of 1/4" thick wood, rubber, steel whatever. Even the use of washers that are wider that the slot on the can, stack them up as high as you need and boom. Fender washers or something.. If u need longer bolts for the mount itself, they are 5/16-18 thread.