chances are 9886 would suit the Roma a pile better then the 2084....2084 kills upper midrange and top end for a tiny extra boost in the bottom........A engine like the Roma will have a pile of its own natural tourque and wont need the help of the 2084.......You wont need to sacrifice all that top end....to me the 2084 is too much like the 9853, a little extra bottom end in exchange for a big sacrifice to midrange and top end.....

edit.... Not trying to take anything away from the 2084....its just that the Roma most likely already has a strong bottom end, so adding on a 9853 type pipe may be going too far in the one direction...usually large engine do better on RPM type pipes, as the bigger engines already have a pile of low end torque and usually need the most help on the top end....!