The 140794 Cat-Back(tm) system by BORLA(r) is designed to fit Silverado and Sierra 1500 trucks that are NOT equipped from the factory with split rear exit exhaust. It is a side exit system featuring a 4" bright chrome on T-304 stainless steel tip and the S-Type sound level. A black chrome on T-304 stainless steel tip is also available. Add Adapter 60706 For Crew Cab with Standard Bed (6' 7") 157" Wheelbase vehicles. Each system is built from premium, high-quality T-304 austenitic stainless steel, superior to T-400 to give you the absolute best in performance and durability. Ultra-smooth mandrel bends ensure maximum flow & power, and precision computer numerical control (CNC) manufacturing ensures an accurate fit. You can count on BORLA(r) to provide durability, performance, sound, and a Million-Mile Warranty.