so I installed some exhaust and test pipes awhile back. . I felt like I lost low end power. I think it took a lot to get back to its normal state (ECU learning), and then some, with the exhaust and TP (like 400 miles). Then the pulley that was installed today, seemed to gave me power on the low/mid range, where I desperately needed. I will be dynoing this weekend to get some solid numbers. I will be reflashing, after the dyno. My car seem to run strong, where, previously, seemed to be lacking some oomph.