I have a 99' Tahoe with dual exhaust. it was on the truck before i bought it, i think the mufflers are Flowmaster's but i'm not sure. they might be some off-brand. It's a true dual exhaust system, (Two of everything from the engine-back). So my question is Can i take off the Cats and straight-pipe it to make it louder? i live in SC, so we dont have emmision's test. So would taking the cats off make it louder and give it a more deep, throaty sound?