Hard to get! Pt no 6002B for Wilesco D366/D376 D406/D416 kit built engines. Consisting of No60B Steam supply pipe (threaded both ends ) & No 62B Steam exhaust pipe Threaded cylinder end.

You can also use this part along with part nos 55 B cylinder & 6002B pipework to turn your production built engine into one you can take apart and rebuild without the need to do any soldering!