heh we call it a "in the margins X", we made that exhaust after all the complaints i was getting with my open exhuast dumping under me infront of the tire, so i bought a couple of flowmasters, and made that exhaust, i dyno'd after i gained 14 rwtq and lost 6rwhp, which is not that bad considering i added allot more pipe and the flowmasters, its not patended or anything so copy if ya like , goin to use the same exhaust setup on my TT 5ho stang wen i get back to the states