Originally Posted by 99SportX

Well, the dyno results speak for themselves. I know a lot of products out there advertise way more than what is realistic (such as typical cold air intake kits or dare I say the tornado fuel saver? haha), but these are true gains. I don't work for them, but everyone who has a set of these things is fully satisfied. If you want to make your explorer move the way it should, then these are the only header to choose.

Ford really messed up when they designed the factory manifolds. Not a first for them though. lol