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GM 12643496 Exhaust Manifold

2008-2017 GM

Customer Questions & Expert Answers (2)
12643496 GM Exhaust Manifold Product Photo 1 of 2
  • Part Description
    Manifold, Engine Exhaust Manifold
  • Replaces
    12615133, 12630741
  • Manufacturer
    General Motors
Make sure this part fits
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  • Related Parts
  • Specifications
  • Fitment
  • Q&A
  • Product Specifications

    BrandGenuine GM
    Manufacturer Part Number12643496
    Part DescriptionExhaust Manifold; Manifold, Engine Exhaust Manifold
    Item Dimensions18.4 x 12.2 x 6.4 inches
    Item Weight13.00 Pounds
    ConditionNew
    Fitment TypeDirect Replacement
    Replaces12615133, 12630741
    ManufacturerGeneral Motors
    SKU12643496
    WarrantyThis genuine GM part is guaranteed by GM's factory warranty.
    Shipping & ReturnShipping Policy Return Policy
    Warning: California's Proposition 65
  • Vehicle Fitment

    Year Make Model Engine Important vehicle option details
    2010-2015 Buick Allure4 Cyl 2.4LCX 4 DOOR SEDAN, CXL 4 DOOR SEDAN
    2010-2016 Buick LaCrosse4 Cyl 2.4LCX 4 DOOR SEDAN, CXL 4 DOOR SEDAN
    2011-2017 Buick Regal4 Cyl 2.4LCX 4 DOOR SEDAN, CXL 4 DOOR SEDAN
    2012-2017 Buick Verano4 Cyl 2.4LCX 4 DOOR NOTCHBACK, CXL 4 DOOR NOTCHBACK
    2014 Chevrolet Impala4 Cyl 2.4LLS 4 DOOR NOTCHBACK, LT 4 DOOR NOTCHBACK
    2008-2014 Chevrolet Malibu4 Cyl 2.4L4 DOOR HYBRID, LS 4 DOOR NOTCHBACK, LT 4 DOOR NOTCHBACK, LTZ 4 DOOR NOTCHBACK
    2012-2014 Chevrolet Orlando4 Cyl 2.4LLS 4 DOOR HIGH ROOF WAGON, LT 4 DOOR HIGH ROOF WAGON, LTZ 4 DOOR HIGH ROOF WAGON
    2008-2010 Pontiac G64 Cyl 2.4LGT 2 DOOR CONVERTIBLE, GT 2 DOOR NOTCHBACK, GT 4 DOOR NOTCHBACK, GTP 2 DOOR NOTCHBACK, GXP 2 DOOR NOTCHBACK, GXP 4 DOOR NOTCHBACK, SE 4 DOOR NOTCHBACK, SE1 2 DOOR NOTCHBACK, SE1 4 DOOR NOTCHBACK
    2009 Saturn Aura4 Cyl 2.4LHYBRID 4 DOOR NOTCHBACK, XE 4 DOOR NOTCHBACK, XR 4 DOOR NOTCHBACK
  • Customer Questions & Expert Answers

    Q:
    I'm wondering if this is complete and correct part for my vehicle.
    A:
    You can Select Your Vehicle to check if 12643496 fits your vehicle.
    Posted and answered by GM Parts Specialist Julian
    Q:
    How to remove and install the Exhaust Manifold in four cylinder engine on Chevrolet Malibu? Posted by Fuego J.
    A:
    Turbocharged 1.5L engines have the exhaust manifold incorporated in the turbocharger. To take off the 2.0L engine exhaust manifold start with the battery by detaching the cable of the negative terminal then work on the exhaust manifold heat shield and the turbocharger. Fourth, the take off of the exhaust manifold support bracket by the use of the mounting nuts and bolt and the removal of the manifold through the removal of the mounting bolts of the manifold from the cylinder head. The above models are as follows: Installation, prior to assembly, scrape the surfaces on cylinder head, manifold, and exhaust pipe with a scraper and brake system cleaner, check that both surfaces are flat and unbroken. Put a new gasket on the cylinder head and fit the manifold Tighten new exhaust manifold bolts to torque specs, starting at the center bolt and in an outward manner regularly to five minutes as the new bolts used have adhesive coating on it. The process of installation is the same as the removal and connecting the battery, after the start of the engine, one should look for exhaust leaks. The most vital preliminary steps for both 2.5L engines are: The negative terminal of the battery should be disconnected and the exhaust manifold heat shield should be removed and the car must be lifted on jack stands securely. Remove penetrating oil up to the core bolts and nuts of the connection of the catalytic converter to the manifold, and extract the catalytic converter. Loose the electrical connection of the oxygen sensor and set down the lead coming from the retaining clip. The exhaust manifold must be unbolted from the cylinder head and therefore, the bolts which secure the manifold must be loosened. In the same way, clean the mating surfaces as mentioned above that should be flat and without any blemishes, fit a new gasket and fit the manifold and tighten the bolt to the competitor torque uniformly. Align the flange of the catalytic converter with the one on the manifold, bolt them together and tighten the bolts, to complete the process follow the reverse process and reconnect the battery, start the engine and physically searching for exhaust leakage.
    You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Jeremy / Jul 17, 2025

Genuine GM Part 12643496, the Right Choice

To ensure reliability, purchase GM part # 12643496 Exhaust Manifold. It is sometimes referred to as GM Exhaust Manifold. Directly from GM, genuine parts are superb with regards to quality, longevity, and fit. Every single part passed stringent quality testing, so you can be sure that it's safe, durable, and built to perform like your original parts. This part fits specific Buick Allure, LaCrosse, Regal models. It fits Chevrolet Impala, Malibu, Orlando. It also fits Pontiac G6. This also fits Saturn Aura.

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