i have a 99' tahoe 2dr 4x4, and it came with an aftermarket exhaust on it already...but just a single, and i dont know what brand. my question is, what is better as far as duals... 2 pipes into single muffler w/ 2 tips, or 2 pipes with 2 mufflers. the setup now is 2 cats, into 1 muffler, with 1 tip? what is best for compression? im not planning on going over 300-hp. i want true duals with good compression. i like flowmaster, but am open to rival companies. i want good sound like a muscle car too. thanks for the help.