There is always someone who wants proof. If their wife would tell them she is seing someone else they would still need proof. My proof is and was self proclaimed years ago, but they just ran a show on Speed and another chanel about Exhausts on the new mustangs. There was a significant difference in HP and torque on their dyno too. 30 plus loss with an X? I don't care what you do , use a T, Y, or a K. When two moving forses cross paths what would you think happens. An H does what it is suppose to do Equalize back pressure which helps balance the exit charge of the motors release of exhaust gas energy without restriction. Crucial in balancing the operation of a combustion engine. Prove it to yourself Take 2 **** pipes put an X in them and flush two loads at the same time and see what happens when they meet?. Wouldn't a straight run be more efficient. And then add a cross over so they flow at the same rate. Also did you know any exhaust length, past the reach of the flame is a restriction and anything shorter robs power . This is why race header installation requires you to paint 20 inch collectors, make a full pass and cut them off at the burn line. Then add cross over tube if possible. I do not think they suggest adding an X.
