TO BAD THE EXHAUST OUTLET HOLES ARE DRILLED ON THE SIDE, SPEWING OIL ALL OVER THE FINISH. ON A PROFILE THEY SHOULD BE DRILLED ON THE BOTTOM, AWAY FROM THE AIRPLANE, NOT IN FRONT OF THE DAMN LEADING. PFFFT!
Have You Got a DRILL ? and some screws or rivets . ?
Ive got a edwardian polished contured Tounge Muffler that has 5 2.5 mm odd holes in the end .
Some charitable soul has drilled five 5/16 holes in the SIDE too . But that niether here nor there .
Rivets/screws/bolts , thru across ( the old holes ) might break up the noise somewhat ,
From Open Exhaust aimed directly at outlet holes .
ANYWAY , you can PLUG cross ones , and I doubt if theres a Law preventing you drilling ones in the end ( Five x 3/32 or 80 thou. maybe )
Tho things might fly , if its to loud . Depending on location .
Nice Plane . You Can Finish Mine , Any Day .