Gord, I tor into the two boxes of the p-51 I got an found two mufflers and the directions for the Quadra engine. It is a Q35. I also heard that if you replace the coil, you could gain 300-500rpms, is that true? What coil replaces it? And which muffler should I use? The straight pipe (designed for this plane) or the box type (came with the engine) which has more power and which is quieter? Thanks in advance.
Jeff