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Pontiac 12558807 Cylinder Head Assembly

1998 Pontiac Firebird

Customer Questions & Expert Answers (2)
12558807 GM Cylinder Head Assembly Illustration 1 of 1
  • Part Description
    Head Assembly, Cyl
  • 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 Number12558807
    Part DescriptionHead Assembly, Cyl
    Other NamesCylinder Head
    Item Dimensions22.3 x 8.8 x 6.7 inches
    Item Weight21.70 Pounds
    ConditionNew
    Fitment TypeDirect Replacement
    Require Quantity2
    ManufacturerGeneral Motors
    SKU12558807
    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
    1998 Pontiac Firebird8 Cyl 5.7L2 DOOR, CONVERTIBLE
  • 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 12558807 fits your vehicle.
    Posted and answered by GM Parts Specialist Julian
    Q:
    What should be done specifically for the Cylinder Head of the 1998 Chevrolet Corvette? Posted by Elijah B.
    A:
    For LS9 engines, removing the hood will facilitate the use of a hoist when taking off the supercharger. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Jeremy / Feb 08, 2025

Genuine GM Part 12558807, the Right Choice

To ensure reliability, purchase GM part # 12558807 Cylinder Head Assembly. It is sometimes referred to as Pontiac Cylinder Head. 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 Firebird models.

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