Looking at pictures of 2011- on Odyssey rear suspension it doesn't look any harder to do then my 2nd gen was. Looks like the hole in the center of the lower spring pocket is made to order
for a RSB bracket attachment. And the floor of the rear seat well looks about the same as mine. Probably the same Ford Ranger front bar could be used. Just takes somebody handy
with tools and some simple fabrication with flat steel bars from the hardware store. Jmo.