Description
Genuine GM replacement driver side exhaust manifold (GM part number 12637647) for the 2001-2016 GM 6.6L Duramax LB7/LLY/LBZ/LMM/LML. A factory replacement part made to GM original equipment specifications.
- Genuine GM OEM part
- GM part number 12637647
Fits: 2001-2016 GM 6.6L Duramax LB7/LLY/LBZ/LMM/LML