2019-Present Silverado/Sierra 1500 2.7L Black-Coated Aluminized Steel 3 Inch Cat-Back Single Side Exit Armor BLK MBRPGet your 2019 up Chevrolet GMC 1500 Silverado Sierra 2. 7L an MBRP Cat Back Exhaust System. MBRP's Cat Back exhaust systems have multiple benefits, here is why you should consider upgrading your OEM exhaust system for one of ours: Durability: Constructed from heavy gauged aluminized steel with fully sealed seams for rust resistance and finished with an engineered high heat black powder coating, our Armor BLK series products are a great option for mild