I just placed my order with Flat 4 Engineering! Everything went smooth and they gave me an awesome deal. I think this exhaust cat-back is worth it. I love the presentation of the whole package and high quality. I heard the Track Series in person and I am really impressed with how their exhaust tone difference from other manufacturers. They have the distinct tone that im looking for, aggresive but not annoying, the plus is that it doesn't sacrifice power and torque. Good stuff!