is there advantages/disadvantages to not having a midpipe? i want two flo 40's, but i dont know whether or not i should get a midpipe. it seems like the sixers sound a little more rumbly running straight pipes to the back. i live in California and need cats, but do i need a midpipe to pass smog? if i do need one, an H will give me a little bit more rumble over an X right? im more concerned about tone over hp cuz ill get it back from other mods.