Exhaust Downpipes/Headers Collector CBR600 F1 - F7 2001 - 2007 - Fuel-injected models only. (These will not fit the earlier CBR600 models from 1991 to 1999) - Developed in 2022 using the latest advancements in exhaust design. - Compatible with your original silencer/muffler or any that fits the original headers. We use the same size/angle/position for the silencer connection as the original. We provide the same size gasket as used by Honda. We also make the silencer kits for this model, see our shop for more details. - TIG-welded by hand: Smooth internals (reduced internal turbulence = improved gas flow = increased potential). - Modern spring fit design: Fewer internal welds = increased potential. - Weight: 3.5 kg/7.7 lbs: Less than half the weight of the originals, .