Rear exhaust df o.s. 46 V engine with tuned pipe. Turns so fast the only prop that will stay on it is the apc composite and you better replace it after every 4 flights or so. Clocked on a thin/clip wing miss Martha at 161 mph at the airport in Wallace, NC. Engine has new sleave and piston. I can't see to fly the racers anymore. Will trade towards dle-20. No paypal but will ship anywhere in lower 48 for 20.00