does anyone on here have any experience with the dynaflex slip in mufflers? I really need to do something about the noise on this thing since I put the marine cam in, and they would be my first choice(6"). I am wondering about the sound level. dynaflex says they are comparable to stock. I want quieter but hopefully not THAT quiet. the ones I'm referring to are the kind that slip inside of a straight pipe. they are the screen design not the auger type.