Nooooo! You really won't need a tuned pipe.
I wanted to put a quiet pipe on mine (when I had it, of course LOL), but I don't think there is enought space inside the fuse, and, if you put it outside, you'll kill the perfect look this plane has, oh, and the aerodynamical design too LOL!



For those who asked about my scheme... It was EXACTLY like this one Marcelo Colombo uses....


Best Regards...
Fábio Quintal

PS: Now I miss my widebody