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Buick 555456 Exhaust Valve

1982-1990 Buick

Customer Questions & Expert Answers (3)
555456 GM Exhaust Valve Illustration 1 of 1
  • Part Description
    VALVE, Exhaust
  • Manufacturer
    General Motors
  • Manufacturer's Notes
    This part is discontinued.
Make sure this part fits
  • Related Parts
  • Specifications
  • Fitment
  • Q&A
  • Product Specifications

    BrandGenuine Buick
    Manufacturer Part Number555456
    Part DescriptionVALVE, Exhaust
    Other NamesExhaust Valve
    Item Dimensions5.4 x 2.2 x 2.2 inches
    Item Weight0.50 Pounds
    ConditionNew
    Fitment TypeDirect Replacement
    ManufacturerGeneral Motors
    SKU555456
    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
    1982-1989 Buick Estate Wagon8 Cyl 5.0LCUSTOM 2 DOOR, CUSTOM 4 DOOR, ELECTRA ESTATE WAGON, ESTATE WAGON, LIMITED 2 DOOR, LIMITED 2 DOOR COLLECT SP EDIT, LIMITED 4 DOOR, LIMITED 4 DOOR COLLECT SP EDIT
    1988-1990, 1982-1985 Buick Lesabre8 Cyl 5.0LCUSTOM 2 DOOR, CUSTOM 4 DOOR, ELECTRA ESTATE WAGON, ESTATE WAGON, LIMITED 2 DOOR, LIMITED 2 DOOR COLLECT SP EDIT, LIMITED 4 DOOR, LIMITED 4 DOOR COLLECT SP EDIT
    1982-1987 Buick Regal8 Cyl 5.0L2 DOOR, 4 DOOR, REGAL, STATION WAGON
    1982-1985 Buick Riviera8 Cyl 5.0LCONVERTIBLE COUPE, RIVIERA, T TYPE
  • Customer Questions & Expert Answers

    Q:
    I want to know whether this will fit my car.
    A:
    You can Select Your Vehicle to check if 555456 fits your vehicle.
    Posted and answered by GM Parts Specialist Bob
    Q:
    What is the process for grinding the Exhaust Valves for the 1987 Chevrolet El Camino? Posted by Ismael B.
    A:
    To grind the valves, apply a small amount of coarse carborundum paste on the seat face and use a suction grinder tool on the valve head, employing a semi-rotary motion while occasionally lifting the valve to redistribute the paste. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Syed / Sep 30, 2022
    Q:
    What is the consequence of refacing the Exhaust Valve if it reduces the edge of the valve head for the 1986 Chevrolet Caprice? Posted by Kalib S.
    A:
    If the refacing of the valve reduces the edge of the valve head to less than the specified width, the valve must be replaced. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Fernando / Feb 10, 2026

Genuine GM Part 555456, the Right Choice

To ensure reliability, purchase GM part # 555456 Exhaust Valve. It is sometimes referred to as Buick Exhaust Valve. 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 Lesabre, Regal, Riviera models.

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