okay so i have done many exhaust systems and normally the muffler has a flow arrow that points which way the exhaust flows.
but i just recently bought a purple hornie to put on my truck and there is nothing significant showing which way to install it...... but i notice if you look down one side you can see holes in the muffler and if you look down the other there are no holes. which way do i put it on???/
i would imagine it goes on the way with the holes facing the flow so that it goes through the holes to create the sound
![I Dunno... :dunno:](https://board.marlincrawler.com/Smileys/marlin/dunno.gif)
?
i held it up to the exhaust both ways and it almost sounds the same.
help? i dont want any
![Blah blah :blah:](https://board.marlincrawler.com/Smileys/marlin/blah.gif)
bashing about buying a glasspack