I bought my Jake from a Dodge dealer and had them install it so that I wouldn't have any warranty problems, although I liked the Pac better because it doesn't require a vacuum pump that is always engaged. The Pac uses air which could be produced with a small compressor that wouldn't always be on. These dealers are such pr*cks when it comes to warranty work I just didn't want to take any chances with the engine warranty, I've probably already screwed up my suspension warranty by installing Kore.
-George-