Verified answer

Go with the 00-04 because the engine is a 02.There must have been some changes thats why they ask you what engine year it is.

That's an unfair comparison intercooled vs non-intercooled. You should definitely get an intercooler, it will give you cooler temperatures and more power, not to mention it's safer. So assuming you're choosing between the Vortech and Procharger both with intercoolers, I'd go with the Procharger. They have consistently shown their ability to produce more power. The Vortech is probably a bit cheaper, but as performance parts go, the more you spend, the more you get. Personally, I'd go with a Kenne Bell Twin Screw Supercharger compared to the Centrifugal type that the Vortech and Procharger are.