I ran about 1.5 under on the street. It has K7 trees, allows you to slide them way up.
The header is a Magnum turbo front section like Cavebear has. Then I got a flange welded on and a back pipe built..used to run down at an angle to the back wheel. Then I cut off about a foot, and got a megaphone rolled and welded that on. It is pretty low, you can push and steer it on level ground with one hand on the center of the handlebars..