[GreenMystChevy]

I was told that if you put the glasspacks on backwards that they are louder, so of course I tried it. Don't know what they sound like on my truck when facing the correct way but on backwards they sure are loud. If you look inside one, they have little pockets for the spent gasses to get caught in to quiet the noise down, when you face it the other way, the gasses just flow right over the pockets kinda like a modified straight pipe. Just a thought.