This is an OEM GM driver-side exhaust manifold off of the LML Duramax but will work on all Duramax engines from 2001-2016. This manifold does not have the restrictive factory kink like the previous generations so it will flow better than factory installed exhaust manifold. You can expect reduced EGTs and drive pressure when swapping to this manifold. This is a great affordable solution for those looking to upgrade their exhaust manifold. We offer the unit with and without the factory heat shield.
Ensure the correct torque and seal by replacing your broken, damaged and rusty hardware with DHD's 300-110 Exhaust Manifold Bolts Kit and DHD's 300-112 Large Flange Up Pipe Bolt Kit.