| whats going on, the cool thing about 2k1 is that the cat converter is located like right after the header, under the car it is like a straight shot nothing but pipe all the way back to the muffler....obviously a cat back is from the cat to the muffler....the down pipe i think is the middle section between the muffler and cat, i wouldnt replace that until you get a header.....then i would buy the pipe, along with a muffler...if you don't wanna start with the header first, which runs like $300 shipped i would just buy the muffler....it should attach perfecting to the connection at the passenger back wheel....that would be close to $250 or $300 also. | 
