Borla S-Type Cat-Back 19-20 Chevrolet Silverado Side Exit Exhaust - Black Chrome TipFactory Single Side Exit vehicles ONLY. The 140800BC 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" black chrome on T 304 stainless steel tip. A bright chrome on T 304 stainless