any one have any of these exhaust setups on there car? If u do can you give me positives and negatives of each of them...and which one you would choose? I already know that the flows super 44's sound really good but there chambered and not stainless steel while the other ones are stainless and straight through mufflers so im wonderin if ill get a few more horses out of em...I mainly wanna know the difference between the SLP loudmouths and Magnaflow Magnapacks in sound because there so similar