Exhaust Downpipes Collector CBR600 FX FY 1999, 2000 models. - Lightweight headers to provide optimum riding, no need for fueling modifications. - Accepts your original silencer/muffler or any that fits your original headers. We use the same size/angle/position for the connection to the silencer as the original and provide the same size gasket. Black Widow also makes the silencer/muffler to match these, if you are looking for the complete upgrade see our CBR600 adverts for the complete system. - TIG-welded by hand for smoother internals. - Modern spring fit design allows for fewer internal welds. - Made from 304 grade stainless steel - We have been making the CBR600 headers for over 15 years and are now proud to offer the best headers we have ever made. - 2 Year.