They are very quick off the line. My pred is pretty much stock, and the YFZ had the baffle removed, airbox lid off, and rejetted. He also had Hauler Extremes compared to my SSIIs. He pretty much smoked me every time. This was up comp hill in Florence, OR a couple weeks ago. Not long enough and pretty steep to get out of 3rd gear. I've heard that at longer distances the Pred will catch them. Also, Im sure that with a pipe it would've been much, much closer.