Another carry over from my old Evo, the Buschur Racing harness bar & Schroth harnesses. While I was looking for solutions to stiffen the Evo chassis, one thing that came up was a removable harness bar – as the inside of the chassis itself is the weakest, so a harness bar helps some there, while being removable to allow for more daily driving type duties (though I don’t daily it.. I barely monthly it).