I thought that someone else had posted about the loss of low end torque with LT headers when followed with an o/r x-pipe. They explained that the loss of torque was due to the loss of back pressure. Anyone remember this discussion. I seem to be having the same problem? I just had Hooker LT headers with an o/r x-pipe installed and my 0-60 mph time increased from 5.3 seconds to 5.6 seconds even though I gained 23 rwhp and 28 ft/lbs of torque. If I remember right, this person welded in some high-flow cats to successfully regain the low-end torque. Any recollections?