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GM 25816005 Catalytic Converter

2008-2010 GM

Customer Questions & Expert Answers (3)
25816005 GM Catalytic Converter Illustration 1 of 1
  • Part Description
    Converter Assembly - 3Way Catalytic With Exhaust Manifold P
  • Manufacturer
    General Motors
Make sure this part fits
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  • Specifications
  • Fitment
  • Q&A
  • Product Specifications

    BrandGenuine GM
    Manufacturer Part Number25816005
    Part DescriptionCatalytic Converter; Converter Assembly - 3Way Catalytic With Exhaust Manifold P
    Item Dimensions33.7 x 14.2 x 8.4 inches
    Item Weight15.50 Pounds
    ConditionNew
    Fitment TypeDirect Replacement
    ManufacturerGeneral Motors
    SKU25816005
    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
    2008-2010 Chevrolet Cobalt4 Cyl 2.0LLEVEL 4 PERFORMANCE/SC (SS) 2 DOOR, LEVEL 4 PERFORMANCE/SC (SS) 4 DOOR
    2008-2010 Chevrolet HHR4 Cyl 2.0L5 DOOR HIGH ROOF HATCHBACK SS, 5 DOOR HIGH ROOF PANEL SS
  • Customer Questions & Expert Answers

    Q:
    I would like to confirm if this is the correct part number for my vehicle. Please advise. Thank you.
    A:
    You can Select Your Vehicle to check if 25816005 fits your vehicle.
    Posted and answered by GM Parts Specialist Henry
    Q:
    How do you start removing the Catalytic Converter for the 2008 Chevrolet Cobalt? Posted by Pablo H.
    A:
    Start by opening the hood and spraying the upper exhaust pipe-to-exhaust manifold flange nuts with penetrating oil. Let it sit for a while and then remove the nuts. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Xavier / May 08, 2024
    Q:
    How do you install the new Catalytic Converter for the 2008 Chevrolet HHR? Posted by Nicklaus A.
    A:
    To install the new catalytic converter, follow the reverse steps of removal. Make sure to use new gaskets at both mounting flanges and new nuts at the front flange and new bolts at the rear flange. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Nicholas / Jul 11, 2025

Genuine GM Part 25816005, the Right Choice

To ensure reliability, purchase GM part # 25816005 Catalytic Converter. It is sometimes referred to as GM Catalytic Converter. 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 Chevrolet Cobalt, HHR models.

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