I have a set of Keleo straight Pipes - Never tried them as they have about 1/2 the Inside Area of my pipes - Should through them on for an RPM test just to see...
Haven't been out flying as its Smoky here- Dry spring and lots of Fires around... That, and I put my back out this weekend -
Did Happen across my next conversion victim.. Found an Enya 46 four stoke to try..