Thanks both for reply. The part numbers won't match as the R1 pipe is Titanium and has no cat, the FZ pipe is the original s/s one with a cat. I think I'd best forget it as the R1 pipe probably won't suit the FZ engine. Have to look elsewhere, again. All I can find new in the UK are Arrow headers, not sure about the quality of them as the Arrow full system on my Street Triple R didn't have the best welding, riveting or finish.