Eh... maybe. It's dual-exit, but not a true dual. An X has the advantage that each side can fire straight through, or turn a slight angle and head out the other side. With the Y to reverse Y, both sides have to collect into a single tube, and then "decide" to split to each side. It's that collection into a single tube that restricts the system. Also, you will still have the non-mandrel bends in the stock Y-pipe that disrupt flow.well it is KIND of dual, dont two Y's make an X?