BORLA 140571 S-Type Cat-Back Exhaust System Kit. T-304 Stainless Steel, includes muffler, 3-1/2 inch to 2-1/4 inch pipe diameter. Single exhaust with dual exit. Split rear exit, polished t-304 stainless steel tips. Compatible with 2014-2018 Chevrolet Silverado 1500/ 2019-2019 Chevrolet Silverado 1500 LD- Old Model/ 2014-2018 GMC Sierra 1500.