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    CNC Ported Heads, M156


    Availability: In stock


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    CNC Ported Heads, M156

    Weistec Engineering announces the one and only CNC port solution for the M156 engine platform.

    Utilizing state of the art technology in CAD digitizing and analysis, Weistec Engineering has created the most consistent, and efficient method of port technology for the M156 engine platform. This proper port design nets a significant increase in laminar intake, and exhaust air flow.

    *Product may not be emissions compliant. Check local laws prior to installation. 

    Key Features:

    • 5-axis CNC machined

    • 397.88 CFM Intake flow

    • 257.81 CFM Exhaust flow

    • Fully assembled, Ready to run heads


    Core exchange must be sent with order. An $8700 core supplement will be charged with no core exchange. Typical lead time is 7-8 business days. ECU tuning is recommended for optimal power gains. All heads are assessed to ensure deck clearance and valve lineup. Chamber size and compression is not effected by CNC Port. (Compression stays at factory spec)

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    Weistec Engineering performance upgrades may be used solely on vehicles used in sanctioned competition which may never be used upon a public road or highway, unless permitted by specific regulatory exemptions. For state specific details please visit the following website.
    It is the responsibility of the installer and/or user of the product to ensure that it is used in compliance with all applicable laws and regulations. If a product was purchased in error, do not install and/or use it. The purchaser must arrange to return the product(s) for a full refund.
    This policy only applies to installers and/or users who are in the United States, customers who reside in other countries should act in accordance with their local laws and regulations.
    All performance modifications and installations are at the customer’s own risk. Weistec Engineering holds no responsibility either implied or otherwise for mechanical, electrical or other failure when using any aftermarket performance products.