This Borla system utilizes the factory transition pipe between the cats and the muffler so that it will fit all cab and bed configurations. Except vehicles with Dual Rear Wheels. The 140851BC Cat-Back(tm) by Borla 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. This system comes with a black chrome on T-304 stainless steel tip. Using Borla Stainless Steel Polish p# 21461 is NOT recommended with these black chrome tips. We suggest cleaning the tips with hot water and a microfiber cloth. And as you would expect it is covered by the Borla Million Mile Warranty.