PRT Performance is offering an economic solution for those who are interested to get a quality product without paying for a preimum price. This is a Do It Yourself (DIY) High Flow Cat B pipe kit for those who wants custom setup and have access to a welder. The kit comes with two pre-cut mandrel 2.5″ B-pipe in either Aluminized Steel or T304L Stainless Steel and two Spun Metallic 300 cell High Flow Catalytic Converters or spun Ceramic 400 Cell High Flow Catalytic Converters. There is an option to purchase O2 sensor bung, 2.5″ 2 bolt flanges and/or hardware kit (gasket and bolts) separately. All optional items can be purchased from your local muffler shops if you choose to purchased from them. NOTE: There may be some cutting needed to fit your need. You will also need to find someone who has experience to Tig or Mig Weld them together. Most local muffler shops can perform this for a small fee.