the exhaust is not loud at all. when i first turned the car on it was like stock sound. then when you accelerate, its has a deep note to it. its just right. i couldnt have picked a better exhaust. as for who i get the stuff from down here in miami, it all depends what, but i have alot of people i know that help me out. teh diameter of the piping is 2.5, and tip size is 120mm (a little over 4 inches). if any of you live near miami, ill be glad to show you my toy..