Factory Single Side Exit vehicles ONLY. The 140800 Cat - Back(tm) system will give your 2.7L Silverado and Sierra the right sound and performance without any of the annoying drone often found in four cylinder applications. The Borla(r) S - Type Cat - Back(tm) system is tuned for flow and sound on the turbo four cylinder engine of the GM 1500 trucks. This system features a 4 bright chrome on T - 304 stainless steel tip. A black chrome on T - 304 stainless steel tip is also available. Add Adapter 60708 For Crew Cab with Standard Bed (6' 7) 157 Wheelbase vehicles. Ultra - smooth mandrel bends ensure maximum flow power, and precision computer numerical control (CNC) manufacturing ensures an accurate fit. The system is constructed using premium, high quality T - 304 stainless steel which is superior to 400 series and is backed by the Borla(r) Million Mile Warranty.