if you want louder the flowmaster 40 series is a good bet.

why do you want louder? i used to have a 50 on my old truck and i really liked the rumble. it wasn't too loud when you get on the gas (that i know neighbours haet) but it had a good growl to it.

 

I use to worry about dynos and stuff...but experience is what I use! People can say they have fast trucks...but do they really?? And my throttle body spacer did help my throttle response...just enough for my to grab 2 lengths on my friends 360 within three seconds, and beat him (which I did before the spacer) I surely did lose low end with my 2 1/4 inch piping and straight pipes. Less back pressure is good, but none at all isn't exactly great!! lol

 

the vid that i posted was with straight pipes, it had 3 or 3.5 tips and i put the 4" tips on and it got ALOT louder

 

Yeah i like the way the 50 sounds, but it's one of flowmaster's quietest mufflers. With the windows up it's not too loud.

I just want something louder, something with a little more bark at in the higher gears. right now when the truck hits overdrive, it sounds stock.