Echo, No, I think the opposite will be true. That is, (I believe) the power surge will occur at lower rpms with the X-pipe closer to the original Y-junction. As I understood MSP's posts, he installed the X-pipe further from the CATS than the original Y was located. I believe the torque increase will occur at higher rpms the further from the headers it is located (at least in a V6 engine) and vice-versa. Lower rpms = lower velocity, so in order to have the first pulse pass the junction just before another cylinder’s exhaust valve opens, you need the distance to that junction shorter. Distance = velocity x time Since the time between “strokes” is constant, lower velocity = less distance. I’m not sure if I’m explaining this well (or even if I’m correct), but X-pipe closer to the cats should give the torque increase lower in the rpm range and vice-versa for further away. A V8 has 4 cylinders per side, so the Left/Right timing isn't as critical as with a V6. Each bank (side) can be "tuned" independently.