Why are long tubes not legal ? I mean if you run an x pipe with cats and o2 sensors and all. Shorties aren't worth putting on and we have emissions testing here. The secret is to have cats and not throw a code. I'm new to the new mustangs, the last one I had was a 68 gt with a 428, so I'm going to need some schooling on the new stuff. I did have a focus st, but they were all kids on the focus forums, as I'm 48, I didn't really fit in. Decided to go back to my roots and since the new stangs look old school, it was a perfect fit. I'm more comfortable around the mustang crowd than the fast and the furious.