BLK85

iTrader: (1)

for a 99+ with a 5.3.

TravisH

iTrader: (1)

Probaby Magnaflow, with a lik 12" case muffler...or a 6'' race bullet

silver-mod-o

iTrader: (15)

get a SLP loudmouth resonator and dump it... youll get loud if you want loud.

Frito Bandito

iTrader: (4)

The Flowmaster Muscle Truck catback is the loudest I've heard, but I've never heard a loudmouth catback on a truck. I think the loudmouth doesnt have a muffler, just a resonater. If thats the case I'm sure its louder than anything else out there.

silver-mod-o

iTrader: (15)

they dont make a truck cat back for the truck to my knowledge but you can get just the resonators alone... get the resonator and then build your own tail pipe(s) or just dump it... I only have a resonator on my truck and it sounds damn good IMO... but its more than just the Ypipe back that gives mine the sound.... there's a little more to it

Frito Bandito

iTrader: (4)

Ahhhh, I just assumed since SLP makes truck parts now they whipped up a loudmouth for trucks.

Red04Silverado

iTrader: (2)

Corsa sport catback would be my vote

1ImperialSS

iTrader: (5)

straight pipes or your classic flowmaster 40 series with some glass packs

xdanny510x

i got long tube headers and true dual exhaust with the dynomax bullets and damn that **** is ****** loud . at somepoints almost sounds like a maro but yea ill try getting some sound clips
btw its a 2005 silverado 5.3

hard2kill

i welded in a SUPER 40 series with my stock piping and its louder then all cat backs ive herd (magnaflow, some flowmaster cb , gibson except for there race truck exhaust etc )and only cost me 90 bucks and an 1hr of my time .........there is a sound diff between the standard 40 series and the super