Air Intake Manifold 3688355 for 2013-2017 Peterbilt 579 Cummins ISX15 Engine. OEM Part Number: 3688355. Engine: 2013.5 - 2018 Cummins ISX15 & X15 Engine. For 2013.5 - 2018 Cummins ISX15 & X15 Engine. Upgraded Exhaust Manifold Mounting Kit For Cummins ISX CM570 Manifold T6 Flange.
