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Pontiac 12455573 Piston Assembly

1985-1991 Pontiac Firebird

Customer Questions & Expert Answers (3)
12455573 GM Piston Assembly Illustration 1 of 1
  • Part Description
    Piston Kit, Engine
  • Replaces
    14094013
  • 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 Number12455573
    Part DescriptionPiston Assembly; Piston Kit, Engine
    Item Dimensions6.9 x 6.8 x 4.6 inches
    Item Weight1.90 Pounds
    ConditionNew
    Fitment TypeDirect Replacement
    Replaces14094013
    Require Quantity8
    ManufacturerGeneral Motors
    SKU12455573
    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
    1985-1991 Pontiac Firebird8 Cyl 5.0L2 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 12455573 fits your vehicle.
    Posted and answered by GM Parts Specialist Julian
    Q:
    What does corrosion evidenced by pitting in the Piston suggest for the 1991 Pontiac Firebird? Posted by Erland H.
    A:
    Corrosion evidenced by pitting suggests coolant leakage, which must be addressed to prevent recurrence in the rebuilt engine. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Fernando / Jul 15, 2025
    Q:
    What does the dial indicator reading indicate about the Piston in the 1988 Pontiac Firebird? Posted by Neshop M.
    A:
    The reading indicates the endplay, which should not exceed the service limit. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Raul / Jun 01, 2023

Genuine GM Part 12455573, the Right Choice

To ensure reliability, purchase GM part # 12455573 Piston Assembly. It is sometimes referred to as Pontiac Piston. 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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