SYSTEMS

MBRP 4" Pro Series Filter-Back Exhaust System S6059304 For 2020-2021 GM 6.6L Duramax L5P ( All Crew & Ext. Cab) The MBRP 4" PRO Series Filter-Back Exhaust System S6059304 will enhance the sound and style of your 2020-2021 GM 6.6L Duramax L5P. MBRP...