Nice car, good video! I own a 2008 G8-GT Red-Hot-Red. Did you replace the stock headers? I have the JBA Headers along with a RotoFab cool air intake looking to get the High Flow Catalytic converters, t6hen new exhaust what is your opinion on the High Flow Cats? The stock converters are 1-3/4 inside and High Flow Catalytic converters are 2-1/2. I haven't replaced the stock exhaust system yet but I like this Solo Performance Cat Back system after watching your video and hearing the car. I have a really loud drown inside the car and hate it... does this system increase or lose that drown altogether?