Blew me away.
So, first off, I have what's known as the 3.slow engine.(A kind of curse on the second gen 4runners, 65 is difficult to hit) I also live at 6000 ft(very thin air) and have maybe two flat roads anywhere in my town. When I put this on, and drove it for the first time, it was unbelievable. I could get to and hold 65 on pretty much any road, plus my low end torque was exceptional. All in all, worth every penny I paid and I'd do it again if I needed to.