Quote:
Originally Posted by D2M
I am surprised to hear about the low end torque loss. I have ARH with cats and that's where most of the gain was felt, right off idle through the mid range to about 6500 / 6600 RPM. I was shocked at how much torque at low RMP it had gained as I was prepared for a loss not a gain. I have no tune and no plans for one.
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the low end torque is definitely improved which surprised me as well. In my ZL1, it seemed like the low end torque with headers was less. No tune for me either.