Hey Tekeman, I wouldn't believe what carparts says. When you see these adds for "adds XX-XX hp",the reason they don't advertise a certain number is because it all depends on what else ya got! Yeah, ya probably could get 45hp outta the chip IF you get more mods with it. I think if you go to Superchips.com you can find that the dyno's for the Superchip on the explorer yeild about 17 at-the-wheel hp's. That's another thing, sometimes the may list engine hp gains vs. at-the-wheel gains.