This is a optional GH Racing Large Aluminum Fuel Filter. This filter
design uses a unique compression fitting style attachment to secure the
fuel line to the filter, reducing the possibility of air leaks and the
possibility of the fuel line coming off the filter during a crash. The
filter also uses a extremely fine mesh screen filter that will prevent
even the finest particles of dirt from entering your engine through the
fuel system. It includes a convenient plastic mount so that the filter
can be easily secured, no matter what chassis it is installed on.