INSTALL INSTRUCTIONS MBRP S5001 Instructions 3" Muffler Bypass, T409 Stainless Steel, 2019-2021 Chev/GMC 1500 5.3L T409 Stainless Steel 3" Muffler Bypass 2019+ Chevy/ GMC 1500 5.3L Audio: 2020 Chevy Silverado 1500 Stock Exhaust Idle sounds: Your browser does not support the audio element. 2020 Chevy Silverado 1500 Stock Exhaust Revving sounds: Your browser does not support the audio element. 2020 Chevy Silverado 1500 MBRP Exhaust Start and Idle sound: Your browser does not support the audio element. 2020 Chevy Silverado 1500 MBRP Exhaust Revving sounds: Your browser does not support the audio element.