I added an x-pipe too and it smoothed out the exhaust sound, but the exhaust sound still sounded horrible and it had to come off. I went back to the stock TI exhaust to get my hearing back. With the SLP all the bad frequencies were loud, and all the good frequencies weren't. :laughing:Haha.. thats funny.. I did do alot of searches before i bought the exhaust.. even looked at the Video you posted when you got them for "Free"..Haha.. Not sure why but in that Video your car is louder than what mine is and i have Lg Headers, No cats, but i do have a Corsa X pipe.. I like the sound of mine and lots of Vette owners love it at shows.. Slp is known for low quality and that is very true but other than that i like em..