saleen kits can be picked pretty cheap used. Usually around 2k for the entire kit. I would never pay new price for it. The saleen kits have a restrictive lower intake, but with a little work, they can be opened up to flow pretty well. The design of the intercooler also has some flaws. The intercooler itself is good, but there are some gaps around it that lets the hot air get around without being cooled. There are also several ways to fix this if you end up getting of these kits.