may be tightened to move ear clamp 181 upward in axial direction 181 such as through threads or another connection because both ear clamp 181 and draw bolt 182 may be seated in clamp 100 this axial movement may cause a net axial downward force on clamp 100 securing clamp 100 to diffuser 2 in an axial direction ratchet surface 190 may prevent loosening of draw bolt 182 in order to maintain the secured positioning example embodiment clamp 100 can be axially secured to diffuser 2 despite potential wear or damage to terminal or inner surfaces of diffuser 2 moreover example embodiment clamp 100 can be axially secured as seen in fig5 without removing or requiring movement of inlet mixer 4 in axial direction 90 because clamp 100 can be axially secured through guide ears 2 b thus inlet mixer 4 can still be axially adjusted and repositioned with respect to a slip joint during installation of example embodiment clamp 100 securing clamp 100 via guide ears 2 b may also prevent relative movement of example embodiment clamp 100 in a radial direction 95 fig6 is a cross section of the detail a region of fig5 as seen in fig6 inner surface 121 of clamp 100 may seat down into diffuser.