No doubt you wont hurt for power amd I figured is was a routing issue but didn't know if there was thought of low end torque involved. I have duals on the CJ everything on the passenger side, 2.5 head pipe to flow masters and then 2.25 out the side at the very rear corner of the tub. It it s currrently running manifolds but I have a set of Hedman Elite inside frame headers on back order that they claim fits fine so we'll see. I lot of folks think that you cant run them on a CJ but it's not even really close anywhere. Not sure at all about a YJ aren't there frames wider? I the tubs are pretty much the same dimensions.