Alright i have been going back and forth between the mac or the flow master ,but i have heard all these things that the flows will make me loose power.Also the rep told me that unless i will be running 500 plus horse to stick with the two and a half cat back ,because i will loose low end torque if i use the three inch cat back .So i guess my question is does anyone have any proof that the flowmaster will make me loose power?also i should add i already have the bassani x-pipe with high flow cats. So do you guys think the mac or the flows would sound better with the bassani.