i thought about this, but what do you mean dual to one because its just single throttle body so it would have to go to the throttle body from both sides and would prolly end up fighting each other at the throttle body, but idk im sure someone will have something to say about this. i am very happy with this intake also in your description it says 25mm spacers? you had room for that with 20's, i have 20x10 on the back and i am looking for spacers not sure what size to go with or where to get them