Any input on a muffler for my 170 that will run well but not be very noisey?
has a stock looking muffler on the outside and is basically a glass pack using SS wool instead of glass. I thought it would be a little louder than stock but it is very quiet. It uses stock pipe sizes (1.5" engine to muffler and 1.25" muffler to tail pipe). They made it about 4" short so I had them make me an extension to fix it that they sent me free. The system is made by Waldron's Exhaust:
The system works great but there may be a better and cheaper SS systems out there...