I think the bends are different. As for the sound, The invidia new sounds more agressive then stock, a little bit louder. But as time goes by and the exhaust settles in, it gets louder and the drone gets a little louder as Logan said. The invidia with high flow cats to me is a bit loud. The invidia with test pipes omg forget it. People will hear you blocks away. A member here had it and when he put on the invidia with the test pipes, i said to myself wtf? I have the invidia on for over a year now. Sound and tone is a little louder but it's not bad to the point where you wana bang your head.