The little-known "concours' de motor" award was a tie at this year's NATs. Mike Greb's ROJett 65 tied with Dale Gleason's PA75. Mike's system involves a header muffler, whilst Dale's is a conventional pipe setup, proving no discrimination in the judging.
The title of the award is a little inaccurate, "concours' de moteur" is probably closer.
To be eligible, the powerplant must be of the internal combustion type. The rules for this award are known to few, and that will remain so. Be informed that electrics are at a distinct disadvantage for this award, as decibels are involved.
Dan Banjock's Dynajet Stunter would certainly be a contender, however, he was a judge and couldn't enter.
Noblers are reds,
and sometimes blues,
dynajets at night
display both.... hues.
dg