Originally Posted by flowmaster23

this is just an idea i had in mind.. after your cats up the pipe size to 4" or 4 1/2" piping and in theory this should make your truck louder.. and here is why.. so if you shout through PVC piping the small normal PVC piping you use in sprinkler systems you get a sound right but it not very loud... but if you shout through a big pipe than it echos. so i would think if you up the pipe size it would echo the sound and be louder. now how much bigger do you have to go i would think maybe 4 1/2" or maybe 4". now i have not tried this but always thought about it. if anyone has other thoughts on this please share