Hi all...does anyone have any size specs on CLK430 mufflers? i am toying with the idea of a borla universal turbo muffler. here are the specs and dimension sizes. which one would fit the CLK430?

here is the order of dimension info:
Part Number Nipple A; Nipple B; Shell Length C; Width E; Height F


40980 2-1/2"; 2-1/2"; 13 1/4"; 7 7/8"; 4 1/4"


40653 2 1/2"; 2 1/2"; 13 1/4"; 9 1/2"; 4"


40659 2 1/2"; 2 1/2"; 14"; 7 7/8"; 4 1/4"

thanks all!!