21461 - Cesare Rossi pipe to old 10cc -15cc REX engine adaptor with screws 21370 and 12450.The CR9 pipe is a direct fit to the R91F engine.
However, for the R50F you need an adaptor (partnr: 21361) to use with the CR5 pipe.
The R60F engine requires also an adaptor (partnr: 21461) to be fitted with the CR6 pipe.
