Xray XB4 2.0mm upper graphite chassis brace
Coming from Xray and made for the XB4 buggy is a 2.0mm upper graphite chassis brace. Cut from high-quality carbon fibre the part is designed to fit atop the composite chassis brace and it makes for less flex and thus more stability. When using the upper brace, the composite rear lower brace has to be removed.
Source: Xray [teamxray.com]