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Pontiac 12598721 Engine Exhaust Manifold

2006 Pontiac G6

Customer Questions & Expert Answers (3)
12598721 GM Engine Exhaust Manifold Illustration 1 of 1
  • Part Description
    Manifold, Exhaust ; Manifold, Engine Exhaust Manifold
  • Manufacturer
    General Motors
  • Manufacturer's Notes
    This part is discontinued.
Make sure this part fits
  • Related Parts
  • Specifications
  • Fitment
  • Q&A
  • Product Specifications

    BrandGenuine Pontiac
    Manufacturer Part Number12598721
    Part DescriptionManifold, Exhaust ; Manifold, Engine Exhaust Manifold
    Other NamesExhaust Manifold, Manifold
    Item Dimensions15.0 x 7.4 x 7.7 inches
    Item Weight8.10 Pounds
    ConditionNew
    Fitment TypeDirect Replacement
    ManufacturerGeneral Motors
    SKU12598721
    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
    2006 Pontiac G66 Cyl 3.5LGT 2 DOOR CONVERTIBLE, GT 2 DOOR NOTCHBACK, GT 4 DOOR NOTCHBACK, GTP 2 DOOR CONVERTIBL, GTP 2 DOOR NOTCHBACK, SE 4 DOOR NOTCHBACK, SE1 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 12598721 fits your vehicle.
    Posted and answered by GM Parts Specialist Julian
    Q:
    How do you detach the Exhaust Manifold for the 2006 Pontiac G6? Posted by Verified Customer
    A:
    Detach the exhaust pipe from the manifold/catalytic converter assembly, unbolt and remove the exhaust manifold brace, and unbolt the exhaust manifold from the cylinder head, discarding the nuts as they must be replaced with new ones. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Henry / Jun 08, 2026
    Q:
    What should be done after installing the Exhaust Manifold for the 2006 Pontiac G6? Posted by Nara G.
    A:
    Reinstall the remaining components in reverse order and start the engine to check for exhaust leaks between the manifold and cylinder head as well as between the manifold and exhaust pipe. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Fernando / Jan 20, 2026

Genuine GM Part 12598721, the Right Choice

To ensure reliability, purchase GM part # 12598721 Engine Exhaust Manifold. It is sometimes referred to as Pontiac 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 Pontiac G6 models.

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