Product Summary

Universal Fit, 4.055" Under Head Length, Steel

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    Key Specs

    MFG. Part #12557840
    BrandChevrolet Performance Parts
    Under Head Length4.055"
    Thread Pitch16mm x 2.0
    Material TypeSteel
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    Need To Know

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    Chevrolet Performance Parts 12557840 Details

    • High quality steel construction
    • Hex head style
    • 16mm x 2.0 thread size
    • 4.055" underhead length
    • Sold each

    Chevrolet Performance Parts 12557840 Specifications

    KEY SPECS
    MFG. Part #12557840
    BrandChevrolet Performance Parts
    Under Head Length4.055"
    Thread Pitch16mm x 2.0
    Material TypeSteel
    GENERAL
    FinishCadmium Plated
    Sold in QuantityEach

    Ratings & Reviews

    5

    4 Reviews

    Overall Assessment

    Customers overwhelmingly affirm the product's quality and effectiveness, commonly noting that it performs as intended. They particularly appreciate the product's genuine GM quality and practicality, despite its torque-to-yield nature that prompts single-use. Many users value the product's affordability compared to reusable alternatives like APR, demonstrating its superior cost-effectiveness. Recommendations frequently advise applications of red Loctite during installation and adherence to GM instructions for optimal performance.

    5

    4 reviews

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    Love these Chevy performance bolts - no problems

    5.0

    3 months ago

    Harm

    Minneapolis MN

    Verified

    LS rebuild

    Would Recommend

    Chev performance - right every time

    5.0

    4 months ago

    Harm

    Minneapolis MN

    Verified

    LS rebuild

    Would Recommend

    Yep it fits 👍🏻

    5.0

    3 years ago

    Brad

    Wisconsin

    Verified

    It works as it should

    Would Recommend

    GM bolt, no issues at all

    5.0

    6 years ago

    Rich C.

    Waverly, NE

    Verified

    These bolts are quality GM products and do the job they are designed to do. The only downside is that they are torque to yield and as such should only be used once. But, given the price of a reusable bolt such as an APR equivalent, you could remove and replace this bolt many, many times for less money. My only suggestion is to liberally use red Loctite on the bolt when installing it and follow the GM installation instructions properly.

    Would Recommend

    Showing 4 of 4 reviews

    Questions & Answers

    Fitment

    • GM LS6

    • GM LS2

    • 6.2 Chevy LS V8

    • 6.2 Chevy LS V8

    • 6.2 Chevy LS V8

    • GM LS1

    • GM LS3

    • GM LS1

    • GM LS1

    • GM LS6

    • GM LS2

    • GM LS3

    • GM LS3

    • 6.2 Chevy LS V8

    • GM LS2

    • 6.2 Chevy LS V8

    • GM LS1

    • GM LS3

    • GM LS1

    • GM LS2

    Customer Impersonation Script