I guess you might be able to try and accomadate one of those for the RC10 or Traxxas ( .21 ) ... if you are handy , you might be able to modify the header pipe to work and the pipe "should" work .
I am using one for a Megatech 16 and works good . ( using one for the 15 engines , just took my handy dandy drill and drilled the stinger a bit bigger in diameter . )