JConcepts B6 Roller Coaster chassis brace
JConcepts now offers a new 3-D-printed chassis brace for the Team Associated B6 chassis, called the roller coaster brace. Available directly through Shapeways, the uniquely shaped and designed brace offers flexibility fore and aft as well as side to side. The part fits directly into the B6 vehicle with laydown style transmission and installs using the standard hardware.
Source: JConcepts [jconcepts.net]