I am thinking about getting a HKS or a Greddy muffler for my max. How much should I sell my stock one for? I have a Cal Max. Does a cat back exhaust go to the front Cat, or the one in the middle?

 

The muffler will bolt on after the BPipe wich is the resonator section. First comes the YPipe next the Catalitic Converter next the BPipe and finaly the muffler. Dont sell your stock muffler yet some of those aftermarkets conbined with a YPipe or BPipe sounds pretty loud. If your only thinking about the muffler well then it's OK.