i have a tahoe with stock 4link with panhard bar. my pan hard bar hits my exhaust do to it being 4"(for turbo). it only hit with hard bumps. i was thinking about making a tubular one for. what type of tubing could i use for this? also my lower links to the axle are c channel as in not boxed. and the uppers look like solid steel piece but looks weak. would i/could i benifit in going with tubular arms with hime(spelling) joint? i know its a tahoe but i want to make it alittle more stable. and i think it might help loose some wieght. and when this thing luanches it twist hard what can i do to help it stop twisting so much?