The 140801 Cat-Back(TM) by Borla(R) is made to give you the best performance, sound and durability possible. It utilizes high quality T-304 stainless steel, superior to T-409, for durability, mandrel bent pipes for high flow and a uniquely designed muffler to give you the best sound without drone. The system utilizes the factory transition pipe between the cats and the muffler so that it will fit all cab and bed configurations. And as you would expect it is covered by the Borla(R) Million Mile Warranty.