Back to Top

Compare Products

You have no items to compare.

    Weistec Forged Rods and Pistons, M156


    Availability: In stock


    * Required Fields


    Weistec Forged Rods and Pistons, M156

    Our forged pistons and billet 4340 rods add a great degree of strength and resilience to the M156 engine. The pistons benefit from an improved wrist pin design over the OEM pistons. The optional piston top ceramic coating helps to increase the heat resistance and the piston skirts are Teflon coated to reduce friction. The billet 4340 rods, which are of a stronger material and design than the original rods, are capable of supporting much higher power levels. These are the pistons and rods that are used in our M156 Built Engine Package.

    Piston to Rod geometry has been optimized for performance as well as an increase in deck thickness. Due to different geometry and wrist pin sizing, pistons and rods must be used together.


    Key Features:

    • Maintains Factory 11.3:1 Compression

    • Optional Ceramic Coated Piston Tops

    • Teflon Coated Pistons Skirts

    • Billet 4340 Connecting Rods

    • Improved Wristpin Design

    • Performance Ring Set Included

    • High Strength/Quality Design and Construction

    • Increased Power Capacity and Heat Dissipation


    It is strongly recommended that customers send their M156 engines to our facility for installation of the Weistec Forged Rods and Pistons as part of a complete engine build.  No tech support will be offered for installation of rods and pistons other than information regarding the orientation of the rods and pistons.  Ring gapping and cylinder bore preparation information will not be provided.

    PDF Filem156_rods (289 KB)Download
    PDF Filem156_pistons (293.9 KB)Download
    PDF Filem156_piston_sheet (192.7 KB)Download


    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.
    Some Weistec Engineering performance upgrades may solely be used on vehicles in sanctioned competition which may never be used upon a public road or highway, unless permitted by specific regulatory exemptions (such as a CARB E.O.). 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.
    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.


    WARNING: Cancer and Reproductive Harm