Brad,

Using a standard Macs muffled or quiet pipe should to the trick. You might just have to raise the canopy slightly with stringers along its sides to accommodate the pipe.

There are a couple of Escape threads in the forum and on RCG that you should take a look at. One Escape is finished and flying, the other is in the planning stages but much was discussed regarding the header. Look for Brian's (Ilikebipes) thread.

There are Hatori headers and pipes for 2 strokes still to be had but they no longer manufacture. There are a couple of companies in England that are producing pipes but I don't see a need for one when a Macs will work.

David.