BORLA 140549 ATAK Cat-Back Exhaust. Exhaust system kit T-304 stainless Steel with muffler. 2-3/4 to 2-1/4 inch pipe diameter. Single exhaust dual exit. $ inch diameter single round rolled angle cut polished T-304 stainless steel tip. Compatible with 2014-2018 Chevrolet Silverado 1500/ 2019-2019 Chevrolet Silverado 1500 LD- Old Model/ 2014-2018 GMC Sierra 1500/ 2019-2019 GMC Sierra 1500 Limited- Old Model.