Best Muffler For a 2000 GMC Sierra

I have a lifted 2000 Sierra 5.3L and I want to get a badass muffler. Ive been looking at the flowmaster outlaw racing series, Dynomax bullet racing muffler, and the Borla x1 racing series muffler but dont want to buy one without a garuntee its going to sound good. I just want something thats going to be loud and sound good.

I have a 02 seirra 5.3 and I put the 40 series flowmaster one in two out and it sounds really and got some hp too

I did the 40 series delta flow 3" in and out. Sounds awsome, would do it again. Just buy one and put it in the stock location. cheap and sounds good.

I have a 2000 Sierra 5.3L with a 40 Series and it added power to it and has a great deep sound. But if you want something real loud then i'd straight pipe it, they sound better in my opinion. My friend has them on his and it's making me change over.