First off all GrayBeard is right a tuned pipe is more trouble on a sport plane than they are worth,
the practicality doesn't out weigh the benefit, it takes a lot of work to get the engine on the pipe and
working without the motor going lean in the air.

The Something Extra was designed as a sport aerobatic airplane and when powered by the recommended
40-46 2 stroker are plenty fast, have a Magnum 52 in mine and about half throttle is pleanty fast for this
plane. Not trying to add insult to injury or start an arguement, but why over power this plane it doesn't
need it.

Bill D.