GM 12637647 Updated Driver Side Exhaust Manifold

2001-2013 GM 6.6L Duramax
Mfg. Number:
XDP Part Number:
✔ QuickShips by Next Business Day*
$5 Price Beat Guarantee
The GM 12637647 Updated Driver Side Exhaust Manifold for your 01-10 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 built with the same quality as your factory exhaust manifold.


  • GM OE Exhaust Manifold
  • Upgrade On 01-10 Duramax Trucks
11-13 LML Note: Because this is the factory manifold that comes on the 11-13 LML Duramax it is simply a replacement part for the LML and not an upgrade like the 01-10 trucks with the "kinked" exhaust manifold. Exhaust manifold gasket not included.

Customer Reviews - Include your order number for a chance to win a $100 GiftCard

Rate This Product:
or Create a Review
(9 Ratings, 0 Reviews) Average Rating: