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GM OEM Updated Driver Side Exhaust Manifold For 01-16 6.6 Duramax

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Pricing: $119.99

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The GM 12637647 Updated Driver Side Exhaust Manifold for your 2001-2016 GM 6.6L Duramax features a "full bore" unlike the factory exhaust manifold that is "kinked or dented" for additional clearance. The increased flow will "balance" the engine and provide increased spool-up, throttle response and better overall performance. This GM OE part is constructed to the same high quality standards as your factory exhaust manifold.


  • GM OE Exhaust Manifold
  • Upgrade On 2001-2010 Duramax Trucks

Application Note:
Because this is the factory manifold that comes on the 2011-2016 LML Duramax it is simply a replacement part for the LML and not an upgrade like the 2001-2010 trucks with the "kinked" exhaust manifold. Exhaust manifold gasket not included.


  • 12637647
  • 12637647
  • GM
  • In Stock & Ready To Ship!
  • New

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  • Item Requires Shipping
  • 5.0 lbs.
  • FREE Ground Shipping

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