When I purchased my SRT8 I said holy smokes this car HAULS A*#. After a while I became used to the speed and power so I decided to drop in a K&N CAI system and I noticed even a bit more pep that put a smile on my face. Soon after I installed a Mangnaflow Cat-Back Competition Exhaust System that put yet another smile on my face in terms of sound and performance. Pushing for even greater performance, last week I installed a Diablo Predator which maximized my previous improvements and I again said, WoW. However, I know soon enough I will be chasing for even more power and speed. I know I have only made very minior modifications, but does it ever end …I suppose not. Perhaps, it part of the fun of owning a Challenger.