Unfortunately the aftermarket for the previous explorers was very weak, it seems to have slowed down or stopped when they went to the uni-body over the body on frame, add in the death of the ranger (less crossover parts), and the only things that were available for the previous explorers was tunes and some very basic intake and exhaust, and only for the turbo motors. I am assuming that a lot of the aftermarket manufacturers are a bit skeptical about jumping in on the ST. However I have heard that Whipple is working on a full kit for the ST, that is on par with the Raptor kit. However that is a rumor, so take it with a grain of salt.