2019-Up Silverado/Sierra 1500 2.7L Armor BLK, Aluminized Steel 3 Inch Cat-Back, 2.5 Inch Dual Split Rear Exit MBRPGet your 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, fully sealed seams for rust resistance making it the ideal choice for dry climates. The same craftsmanship as our premium products, our Armor BLK systems have the added