Installer Series Aluminized Cool Duals Turbo Back Diesel Exhaust System Fits Right The First Time-every Component Fits As Expected! The Lowest Bend Degree Angles And Smooth Mandrel Bends Mean That Exhaust Gases Have An Easier Path To The Tip, Moving Faster And Reducing Exhaust Gas Temperatures-allows Your Truck To Maintain Optimal Operating Temperatures Under High Performance Conditions, Resulting In Fuel Efficiency, More Torque And More Horsepower System Is Suitable For Areas With Moderate Environmental Conditions Designed And Built To Stand Up To The Harshest Road Conditions! 4" Mandrel Bent Tubing And Will Give You The Greatest Sound Possible! Bolts Directly On. Includes All Pipes, Mufflers, Hangers And Hardware. Made Of 100% Heavy-gauge Aluminized Steel So It's Rugged And Dependable! Comes With Manufacturer's 1-year Warranty. Tips Sold Separately.