Scott, they claim this kit to have 'no' bump steer, although that's not really possible...barely any I would say. All cars have a small amount built in...but barely readable...I think that's what they meant to say. When I emailed them prior to placing my order, they told me there would not be any b/s on a car lowered up to 2"...after that you may need to use the Baer Trackers. I'll try to mock up the steering shaft to give you a better idea of space required and to help compared to a stock box/components.
Here's a link for more info.