I have been looking at stacks that company's sell and after going to truck shops and checking the prices and measurements of the Y pipes and found that all pieces are available from local over the road truck shops for around $250 depending on what type of stack you get. There are many types and styles of Y pipes that I believe will fit better than some kits that are sold for 500-1100. I just thought that I would put this bug in your ears if people want to save a lot of penny's to put in the fuel tank instead.