I have the McCord Power Plates. $250.00 for the whole set up. I absolutely love them. I have a Jeckle and Hyde thing going on. Through the exhaust, I am running three chamber flowmasters. Very quiet. When I push the button, the 2.5" dumps open up just after the h-pipe. Talk about people taking notice, it sounds like a nascar. I have actually had people roll down there window's at lites and and ask me about the car. When running through the mufflers, no one tends to take notice. It you drive up to a car show with the dumps open, Everyone will stop what they are doing and watch you. It is a pretty boost to your ego.