In response to the many requests from Porsche drivers looking for a harness guide bar that would not only guide their driving harnesses, but allow them to mount their harnesses directly to the bar, we developed the harness truss . This harness truss has been tested and certified to handle types of forces required by the national highway traffic safety admin. Dot and sae j385 rev.mar 95, motor vehicleseat belt anchorages- performance requirements. Strong, yet it weighs only a fraction of what a support of the same strength made from tubular or bar steel would weigh. The harness truss is precision water-jet machined for a perfect fit into Porsche factory mountin points. A mount really can t be relied on unless it has been tested to support the loads required by the national highway taffic safety administration.