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.