equipped with catalytic converters for racing purposes only 6 comes with h-pipe/ ... balance tube assembly for racing purposes only 8 installation on manual ... later vehicles and is recommended for racing purposes only for these models 40 will ... e.g.r system and is recommended for racing purposes only for these models 41 this ... e.g.r system and is recommended for racing purposes only on these models 43 fits ... fit with c-6 automatic transmissions 45 this part number consists of headers ... system is supplied with an optional racing h-pipe/balance tube assembly for use on ... racing vehicles only which replaces the ... to prevent damage caused by leaded racing fuel this optional h-pipe/balance tube ... assembly is illegal except for racing vehicles which may never be driven upon ... tube assembly is illegal except for racing vehicles which may never be driven upon ...